Update pnpm/action-setup action to v4 (#53)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4.0.0
       - name: Setup pnpm
-        uses: pnpm/action-setup@v3.0.0
+        uses: pnpm/action-setup@v4.0.0
         with:
           version: 8.x.x