chore(deps): Update peter-evans/create-pull-request action to v8

Author: cq-bot

.github/workflows/regen.yml

@@ -28,7 +28,7 @@ jobs:
           npm run proto-all
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         with:
           # required so the PR triggers workflow runs
           token: ${{ secrets.GH_CQ_BOT }}