Fix git commit invocation.

Author: grafikrobot

.github/workflows/web-publish.yml

@@ -63,7 +63,7 @@ jobs:
         run: |
           git config user.email "[email protected]"
           git config user.name "ecostd"
-          git commit -a -m "Update generated information." CONTRIBUTIONS.adoc
+          git commit -m "Update generated information." CONTRIBUTIONS.adoc
       - name: Setup Pages
         uses: actions/configure-pages@main
       - name: Upload artifact