fix: Playwright CIのレポートpush競合を修正

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

Author: yn1323

.github/workflows/playwright.yml

@@ -65,6 +65,7 @@ jobs:
           git config user.email "github-actions[bot]@users.noreply.github.com"
           git add .
           git commit -m "Playwright report for PR #${{ github.event.pull_request.number }}" || exit 0
+          git pull --rebase
           git push
       - name: Comment PR with Report Link
         if: ${{ !cancelled() }}