chore: update version-bump workflow to edit existing PR comment

Uses --edit-last to update the previous comment instead of creating
a new one on each push.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: K-Mistele

.github/workflows/version-bump.yml

@@ -82,4 +82,5 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
+          gh pr comment ${{ github.event.pull_request.number }} --body-file CLAUDE_OUTPUT.md --edit-last || \
           gh pr comment ${{ github.event.pull_request.number }} --body-file CLAUDE_OUTPUT.md