ci: Reduce checks run duplication

Author: dbanty

.github/workflows/checks.yml

@@ -2,12 +2,10 @@ name: Run Checks
 
 on:
   push:
-    branches: ["**"]
+    branches: ["main"]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [main]
-  schedule:
-    - cron: '0 23 * * 2'
+    branches: ["main"]
 
 jobs:
   test: