Add git diagnostics to workflow

.github/workflows/publish.yml

@@ -30,6 +30,8 @@ jobs:
         run: |
           git config --local user.email "action@github.com"
           git config --local user.name "GitHub Action"
+          git status
+          git branch -a
           git add icalendar.plug.js
           if git diff --quiet --staged; then
             echo "No changes to commit"