fix: use PAT for CSV auto-update workflow (#14)

GITHUB_TOKEN cannot bypass branch protection ruleset.
Use PAT_TOKEN secret (repo admin has bypass permission).

.github/workflows/update-csv.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          persist-credentials: false
+          token: ${{ secrets.PAT_TOKEN }}
 
       - uses: actions/setup-python@v5
         with:
@@ -28,11 +28,8 @@ jobs:
         run: python src/results_to_csv.py
 
       - name: Commit if changed
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
-          git remote set-url origin https://x-access-token:${GITHUB_TOKEN}@github.com/${{ github.repository }}
           git add results.csv
           git diff --staged --quiet || (git commit -m "Auto-update results.csv" && git push)