ci(deps): Bump pnpm/action-setup from 2 to 4

Bumps [pnpm/action-setup](https://github.com/pnpm/action-setup) from 2 to 4.
- [Release notes](https://github.com/pnpm/action-setup/releases)
- [Commits](pnpm/action-setup@v2...v4)

---
updated-dependencies:
- dependency-name: pnpm/action-setup
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/deploy-pages.yml

@@ -40,7 +40,7 @@ jobs:
           node-version: '20'
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 9