fix: bump slackapi/slack-github-action from 3.0.5 to 4.0.0 (#15902)

Bumps
[slackapi/slack-github-action](https://github.com/slackapi/slack-github-action)
from 3.0.5 to 4.0.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/slackapi/slack-github-action/releases">slackapi/slack-github-action's
releases</a>.</em></p>
<blockquote>
<h2>Slack GitHub Action v4.0.0</h2>
<h3>Major Changes</h3>
<ul>
<li>
<p>b1974f0: build: parse yaml with more strict multiline indentation
rules</p>
<p>Internal dependencies of <a
href="https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md#500---2026-06-20"><code>js-yaml@v5</code></a>
make YAML parsing more strict and compliant with the YAML specification.
Indentation is now required for values that span multiple lines against
the base value.</p>
<p>See the YAML <a
href="https://yaml.org/spec/1.2.2/#63-line-prefixes">line prefixes</a>
spec for the expected indentation rule:</p>
<pre lang="diff"><code>  channel: &quot;C0123&quot;
  text: &quot;first line
<ul>
<li>second line&quot;</li>
</ul>
<ul>
<li>second line&quot;<br />
</code></pre></li>
</ul>
</li>
</ul>
<h3>Patch Changes</h3>
<ul>
<li>654bb72: chore: provide global fetch proxied configurations with
updates to web api and webhook packages</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/slackapi/slack-github-action/blob/main/CHANGELOG.md">slackapi/slack-github-action's
changelog</a>.</em></p>
<blockquote>
<h1>slack-github-action</h1>
<h2>4.0.0</h2>
<h3>Major Changes</h3>
<ul>
<li>
<p>b1974f0: build: parse yaml with more strict multiline indentation
rules</p>
<p>Internal dependencies of <a
href="https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md#500---2026-06-20"><code>js-yaml@v5</code></a>
make YAML parsing more strict and compliant with the YAML specification.
Indentation is now required for values that span multiple lines against
the base value.</p>
<p>See the YAML <a
href="https://yaml.org/spec/1.2.2/#63-line-prefixes">line prefixes</a>
spec for the expected indentation rule:</p>
<pre lang="diff"><code>  channel: &quot;C0123&quot;
  text: &quot;first line
<ul>
<li>second line&quot;</li>
</ul>
<ul>
<li>second line&quot;<br />
</code></pre></li>
</ul>
</li>
</ul>
<h3>Patch Changes</h3>
<ul>
<li>654bb72: chore: provide global fetch proxied configurations with
updates to web api and webhook packages</li>
</ul>
<h2>3.0.5</h2>
<h3>Patch Changes</h3>
<ul>
<li>96fddbe: fix: revert multiline yaml parsing indentation change</li>
</ul>
<h2>3.0.4</h2>
<h3>Patch Changes</h3>
<ul>
<li>fa03fe4: refactor: send webhooks with the <a
href="https://docs.slack.dev/tools/node-slack-sdk/webhook"><code>@slack/webhook</code></a>
package</li>
</ul>
<h2>3.0.3</h2>
<h3>Patch Changes</h3>
<ul>
<li>66834e4: feat: add instrumentation to address error rates</li>
</ul>
<h2>3.0.2</h2>
<h3>Patch Changes</h3>
<ul>
<li>79529d7: fix: resolve url.parse deprecation warning for webhook
techniques</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/dcb1066f776dd043e64d0e8ba94ca15cc7e1875d"><code>dcb1066</code></a>
chore: release</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/53861e0291660faf57ba686eabf046d5a47fa304"><code>53861e0</code></a>
chore: release (<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/645">#645</a>)</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/b1974f0d29f2b6150fc5a376312d365bd75fdd9b"><code>b1974f0</code></a>
build!: parse yaml with more strict multiline indentation rules (<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/640">#640</a>)</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/947ed0677cba8e56cf374d88bfd2d8f72aa9100c"><code>947ed06</code></a>
build(deps): bump undici from 7.28.0 to 8.7.0 (<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/653">#653</a>)</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/03922a90c917c4d3d3b1c0f35984c2ac23955560"><code>03922a9</code></a>
chore: track undici-types to the resolved undici version (<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/652">#652</a>)</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/31d473e1d0da2837ee5149493a62a54103e5b45a"><code>31d473e</code></a>
build(deps-dev): bump typescript from 6.0.3 to 7.0.2 (<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/651">#651</a>)</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/3ca6997fb72e86b0babe7037ff2ca4a5908b6148"><code>3ca6997</code></a>
build(deps-dev): bump sinon and <code>@​types/sinon</code> (<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/649">#649</a>)</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/26a5ad3c5af9cde63a5bb0667fc9e40accce2710"><code>26a5ad3</code></a>
build(deps): bump actions/setup-node from 6.4.0 to 7.0.0 (<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/647">#647</a>)</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/5092efb0558a5d075f0dd02279f332a116a461ef"><code>5092efb</code></a>
build(deps-dev): bump <code>@​biomejs/biome</code> from 2.5.3 to 2.5.4
(<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/650">#650</a>)</li>
<li><a
href="https://github.com/slackapi/slack-github-action/commit/3548c3e9500515cd56aa64222b12088f5e6bd6fe"><code>3548c3e</code></a>
build(deps): bump slackapi/slack-github-action from 3.0.3 to 3.0.5 (<a
href="https://redirect.github.com/slackapi/slack-github-action/issues/646">#646</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/slackapi/slack-github-action/compare/0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc...dcb1066f776dd043e64d0e8ba94ca15cc7e1875d">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/create_release.yml

@@ -2886,7 +2886,7 @@ jobs:
     if: ${{ always() && needs.prepare_release.outputs.should_publish == 'true' }}
     steps:
       - name: Send Slack notification if unsuccessful
-        uses: slackapi/slack-github-action@0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc # v3.0.5
+        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         if: ${{ needs.collect_results.outputs.failed != '' }}
         with:
           # Fail the step when Slack rejects the message.
@@ -3045,7 +3045,7 @@ jobs:
 
       - name: Post to a Slack channel
         id: slack
-        uses: slackapi/slack-github-action@0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc # v3.0.5
+        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         if: ${{ steps.build_slack_payload.outputs.has_content == 'true' }}
         # Continue on with the rest of the workflow, even if we fail to send the
         # changelog info to Slack.  (We still want to stick the changelog JSON

.github/workflows/feature_flag_cleanup.yml

@@ -257,7 +257,7 @@ jobs:
           echo "Pull request created: ${{ steps.create_pr.outputs.pull-request-url }}"
         
       - name: Send Slack notification
-        uses: slackapi/slack-github-action@0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc # v3.0.5
+        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         if: ${{ steps.create_pr.outputs.pull-request-operation == 'created' }}
         with:
           method: chat.postMessage