chore(deps): bump pnpm/action-setup from 6 to 6.0.9

Bumps [pnpm/action-setup](https://github.com/pnpm/action-setup) from 6 to 6.0.9.
- [Release notes](https://github.com/pnpm/action-setup/releases)
- [Commits](pnpm/action-setup@v6...v6.0.9)

---
updated-dependencies:
- dependency-name: pnpm/action-setup
  dependency-version: 6.0.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/index-docs.yml

@@ -45,7 +45,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v6
+        uses: pnpm/action-setup@v6.0.9
 
       - name: Setup Node.js
         uses: actions/setup-node@v7