run CI on push to ALL branches too (but only actually run if this i…

…s a pull_request from a fork OR push to an internal branch)

.github/workflows/ci.yml

@@ -3,11 +3,10 @@ on:
   workflow_dispatch: # Manual invocation.
   pull_request:
   push:
-    branches:
-      - main
-      - 'pr**'
 jobs:
   CI:
+    # only actually run if this is a pull_request from a fork OR push to an internal branch
+    if: github.event.pull_request.head.repo.fork || github.event_name != 'pull_request'
     runs-on: ubuntu-latest
     permissions:
       # required by aws-actions/configure-aws-credentials