Remove git config for dependabot user

[nev21]

Removed global git config commands for user name and email.

[Copilot]

Pull request overview

This PR removes the git config commands that set the user name and email for the dependabot-sync bot in the Rush version sync workflow.

Key Changes:

• Removed git config --global user.name "dependabot-sync[bot]" command
• Removed git config --global user.email "dependabot-sync[bot]@users.noreply.github.com" command

Comments suppressed due to low confidence (1)

.github/workflows/sync-rush-versions.yml:82

• The removal of git config commands will cause the git commit command on line 80 to fail. Git requires user.name and user.email to be configured before making commits. Without these config values, the workflow will error with "Please tell me who you are" when attempting to commit.

The actions/checkout action does not automatically configure git user identity. You need to either:

1. Keep the git config commands (restore the removed lines)
2. Use a GitHub Action that handles commits (e.g., stefanzweifel/git-auto-commit-action)
3. Configure git user via the actions/checkout action if it supports that in v6

      - name: Commit changes
        run: |
          # Add files that exist
          if [ -f rush.json ]; then git add rush.json; fi
          if [ -f common-versions.json ]; then git add common-versions.json; fi
          if [ -f common/config/rush/npm-shrinkwrap.json ]; then git add common/config/rush/npm-shrinkwrap.json; fi
          # Add all changes in common/scripts folder if it exists
          if [ -d common/scripts ]; then git add common/scripts/; fi
          if git diff --staged --quiet; then
            echo "No changes to commit."
          else
            git commit -m "chore: sync rush.json and regenerate lockfiles"
            git push
          fi

[nev21]

@copilot revert this PR