Skip PR workflow for branches

Author: jorgemanrubia

.github/workflows/ci-pr.yml

@@ -5,6 +5,7 @@ on:
 
 jobs:
   call-ci:
+    if: github.event.pull_request.head.repo.full_name != github.repository
     uses: ./.github/workflows/ci.yml
     with:
       saas: false