Bump pnpm/action-setup from 3 to 4

Bumps [pnpm/action-setup](https://github.com/pnpm/action-setup) from 3 to 4.
- [Release notes](https://github.com/pnpm/action-setup/releases)
- [Commits](pnpm/action-setup@v3...v4)

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

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           token: ${{ secrets.SORT_DB_PAT }}
-      - uses: pnpm/action-setup@v3
+      - uses: pnpm/action-setup@v4
       - uses: actions/setup-node@v4
         with:
           node-version-file: ".nvmrc"