Bump pnpm/action-setup from 4 to 6

Bumps [pnpm/action-setup](https://github.com/pnpm/action-setup) from 4 to 6.
- [Release notes](https://github.com/pnpm/action-setup/releases)
- [Commits](pnpm/action-setup@v4...v6)

---
updated-dependencies:
- dependency-name: pnpm/action-setup
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build-pages.yml

@@ -47,7 +47,7 @@ jobs:
           ref: ${{ inputs.tools-ref || github.job_workflow_sha }}
           path: .ote-tools
 
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
         with:
           package_json_file: .ote-tools/package.json
 

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v4
         with:
           node-version: 22

.github/workflows/deploy-tools.yml

@@ -26,7 +26,7 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v4
         with:
           node-version: 22

.github/workflows/publish.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v4
         with:
           node-version: 22

.github/workflows/validate.yml

@@ -36,7 +36,7 @@ jobs:
           ref: ${{ inputs.tools-ref || github.job_workflow_sha }}
           path: .ote-tools
 
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
         with:
           package_json_file: .ote-tools/package.json