chore(deps): update googlecloudplatform/release-please-action action to v4 (#118)

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

Author: renovate[bot]

.github/workflows/release-please.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           private-key: ${{ secrets.TOKENS_PRIVATE_KEY }}
           app-id: ${{ secrets.TOKENS_APP_ID }}
-      - uses: GoogleCloudPlatform/release-please-action@v3
+      - uses: GoogleCloudPlatform/release-please-action@v4
         id: release
         with:
           token: ${{ steps.get-token.outputs.token }}