Chore(fix): Configure git user for rebase in sync workflow

Author: AzureG03

.github/workflows/sync.yml

@@ -39,6 +39,8 @@ jobs:
       - name: Rebase Upstream
         if: env.UPDATE == 'true'
         run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
           if git rebase upstream/master; then
             echo "REBASE_SUCCESS=true" >> $GITHUB_ENV
           else