actions/protobuf: upgrade create pr action to v3 [skip ci]

Author: markus-wa

.github/workflows/protobuf.yml

@@ -61,11 +61,12 @@ jobs:
       - name: Create Pull Request
         id: pr
         if: env.PROTOBUFS_CHANGED == 'true'
-        uses: peter-evans/create-pull-request@v2
+        uses: peter-evans/create-pull-request@v3
         with:
           title: "protobuf: updated to ${{ env.COMMIT_SHA }}"
           base: master
           branch: update-protobufs
+          author: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
           commit-message: |
             protobuf: updated to ${{ env.COMMIT_SHA }}