Bump fastapi-sso from 0.19.0 to 0.20.0 in /backend (#1558)

Bumps [fastapi-sso](https://github.com/tomasvotava/fastapi-sso) from
0.19.0 to 0.20.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/tomasvotava/fastapi-sso/releases">fastapi-sso's
releases</a>.</em></p>
<blockquote>
<h2>0.20.0</h2>
<h2>What's Changed</h2>
<ul>
<li>chore(deps): bump the all group across 1 directory with 3 updates by
<a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/tomasvotava/fastapi-sso/pull/270">tomasvotava/fastapi-sso#270</a></li>
<li>chore(deps): bump the all group across 1 directory with 5 updates by
<a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/tomasvotava/fastapi-sso/pull/273">tomasvotava/fastapi-sso#273</a></li>
<li>feat: Add soundcloud provider by <a
href="https://github.com/john-9474"><code>@​john-9474</code></a> in <a
href="https://redirect.github.com/tomasvotava/fastapi-sso/pull/272">tomasvotava/fastapi-sso#272</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/john-9474"><code>@​john-9474</code></a>
made their first contribution in <a
href="https://redirect.github.com/tomasvotava/fastapi-sso/pull/272">tomasvotava/fastapi-sso#272</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/tomasvotava/fastapi-sso/compare/0.19.0...0.20.0">https://github.com/tomasvotava/fastapi-sso/compare/0.19.0...0.20.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/tomasvotava/fastapi-sso/commit/60380bba7f8ef58c1226e5e9887a1b2cb377f0a6"><code>60380bb</code></a>
bump: =&gt; v0.20.0</li>
<li><a
href="https://github.com/tomasvotava/fastapi-sso/commit/33d64d002402324503e2924b4199129e7e5e76f7"><code>33d64d0</code></a>
feat: Add soundcloud provider (<a
href="https://redirect.github.com/tomasvotava/fastapi-sso/issues/272">#272</a>)</li>
<li><a
href="https://github.com/tomasvotava/fastapi-sso/commit/89a1d9a641e26821b27e54f7321345739b10f14c"><code>89a1d9a</code></a>
chore(deps): bump the all group across 1 directory with 5 updates (<a
href="https://redirect.github.com/tomasvotava/fastapi-sso/issues/273">#273</a>)</li>
<li><a
href="https://github.com/tomasvotava/fastapi-sso/commit/079dc22aa7a30f656b20aea62091fd89ebb8b8c8"><code>079dc22</code></a>
chore(deps): bump the all group across 1 directory with 3 updates (<a
href="https://redirect.github.com/tomasvotava/fastapi-sso/issues/270">#270</a>)</li>
<li><a
href="https://github.com/tomasvotava/fastapi-sso/commit/0b6a2433e7ff259b2dd6a8c8b842aea3e15b0cf0"><code>0b6a243</code></a>
docs: fix security notice order</li>
<li>See full diff in <a
href="https://github.com/tomasvotava/fastapi-sso/compare/0.19.0...0.20.0">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=fastapi-sso&package-manager=uv&previous-version=0.19.0&new-version=0.20.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/pyproject.toml

@@ -12,7 +12,7 @@ dependencies = [
     "click==8.3.0",
     "databases[asyncpg]==0.9.0",
     "fastapi==0.128.0",
-    "fastapi-sso==0.19.0",
+    "fastapi-sso==0.20.0",
     "gunicorn==25.0.1",
     "heliclockter==3.0.1",
     "parameterized==0.9.0",