tools: specify a commit-message for V8 update workflow

PR-URL: #52844
Fixes: #50497
Refs: gr2m/create-or-update-pull-request-action#280
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>

.github/workflows/update-v8.yml

@@ -50,6 +50,7 @@ jobs:
           author: Node.js GitHub Bot <github-bot@iojs.org>
           body: This is an automated patch update of V8 to ${{ env.NEW_VERSION }}.
           branch: actions/update-v8-patch  # Custom branch *just* for this Action.
+          commit-message: 'deps: patch V8 to ${{ env.NEW_VERSION }}'
           labels: v8 engine
           title: 'deps: patch V8 to ${{ env.NEW_VERSION }}'
           update-pull-request-title-and-body: true