Run CI on cron to avoid stale

Author: Jean85

.github/workflows/continuous-integration.yml

@@ -1,5 +1,11 @@
 name: Testing
-on: [push]
+on:
+  pull_request: ~
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: "30 6 * * 1"
 jobs:
   build:
     runs-on: ubuntu-latest