Bump actions/setup-node in /.github/actions/pnpm-setup (#48249)

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 4.4.0 to 6.4.0.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](49933ea528...48b55a011b)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: 6.4.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/actions/pnpm-setup/action.yml

@@ -11,7 +11,7 @@ runs:
   using: composite
   steps:
     - name: Set up Node.js
-      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+      uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
       with:
         node-version: ${{ inputs.node-version }}
         check-latest: true