chore(build): run CodeQL on PR and push only

Author: afranken

.github/workflows/codeql.yml

@@ -17,8 +17,6 @@ on:
   pull_request:
     # The branches below must be a subset of the branches above
     branches: [s3mock-v2, s3mock-v3, s3mock-v4, main]
-  schedule:
-    - cron: '43 21 * * 6'
 
 # Declare default permissions as read only.
 permissions: read-all