Reduce PR check failures (#858)

.github/workflows/codeql-analysis.yml

@@ -7,10 +7,10 @@ name: "CodeQL Security Scan"
 
 on:
   push:
-    branches: [main]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [main]
+    branches:
+      # only run when there are pushes to the main branch (not on PRs)
+      - main
+
   schedule:
     - cron: '0 0 * * 3'
 

.github/workflows/validations.yaml

@@ -2,6 +2,8 @@ name: "Validations"
 on:
   workflow_dispatch:
   push:
+    branches:
+      - main
   pull_request:
 
 env: