chore(gh): update release-please-action & run tests before release

Author: gierschv

.github/workflows/gem-push.yml

@@ -9,11 +9,10 @@ jobs:
     name: Build + Publish
     runs-on: ubuntu-latest
     permissions:
-      contents: read
-      packages: write
-
+      contents: write
+      pull-requests: write
     steps:
-    - uses: GoogleCloudPlatform/release-please-action@v2
+    - uses: google-github-actions/release-please-action@v4
       id: release
       with:
         release-type: ruby
@@ -27,6 +26,10 @@ jobs:
       with:
         ruby-version: 3.3
       if: ${{ steps.release.outputs.release_created }}
+    - name: Run tests
+      run: |
+        bundle exec rspec
+      if: ${{ steps.release.outputs.release_created }}
     - name: Publish to GPR
       run: |
         mkdir -p $HOME/.gem