Try removing the explicit git add

.github/workflows/download_pinboard_bookmarks.yml

@@ -14,10 +14,9 @@ jobs:
         with:
           bundler-cache: true
       - run: bundle exec rake download_pinboard_bookmarks
-      - name: Commit files
+      - name: Commit data/pinboard_bookmarks.yml
         run: |
           git config --local user.email "action@github.com"
           git config --local user.name "GitHub Action"
-          git add data/pinboard_bookmarks.yml
           git commit --only data/pinboard_bookmarks.yml --message "Ran rake download_pinboard_bookmarks in a GitHub Action" || echo "Nothing to commit"
           git push