ci: fix release-please-action org to googleapis

The action was previously referenced as google-github-actions which
does not have a v5 tag. The correct org is googleapis.

Author: mwfarb

.github/workflows/release-please.yml

@@ -7,7 +7,7 @@ jobs:
   release-please:
     runs-on: ubuntu-latest
     steps:
-      - uses: google-github-actions/release-please-action@v5
+      - uses: googleapis/release-please-action@v5
         with:
           release-type: python
           package-name: release-please-action