tweak hearbeat workflow

Author: mholling

.github/workflows/update-heartbeat.yml

@@ -17,5 +17,5 @@ jobs:
         git config user.name "github-actions[bot]"
         git config user.email "github-actions[bot]@users.noreply.github.com"
         git add heartbeat.json
-        git commit -m "update heartbeat" || echo "No changes to commit"
-        git push
+        git commit --amend -m "update heartbeat" || echo "No changes to commit"
+        git push --force-with-lease