add push to main

.github/workflows/nightly.yml

@@ -3,6 +3,9 @@ name: Run nightly tests
 on:
   schedule:
     - cron: '0 0 * * *' # Every day at midnight UTC
+  push:
+    branches:
+      - main
 jobs:
   run-tests:
     runs-on: [ubuntu-latest, cloud]