chore(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-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/release-on-merge.yml

@@ -13,7 +13,7 @@ jobs:
     concurrency: ${{ github.ref }}
     steps:
       - uses: actions/checkout@v3
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v4
         with:
           version: 7.6.0
       - uses: actions/setup-node@v3

.github/workflows/test-on-pull-request.yml

@@ -8,7 +8,7 @@ jobs:
     concurrency: ${{ github.ref }}
     steps:
       - uses: actions/checkout@v3
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v4
         with:
           version: 7.6.0
       - uses: actions/setup-node@v3