Merge branch '3' into 4

Author: GuySartorelli

.github/workflows/ci.yml

@@ -8,6 +8,8 @@ on:
 jobs:
   ci:
     name: CI
+    # Do not run if this is a pull-request from same repo i.e. not a fork repo
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.repository
     uses: silverstripe/gha-ci/.github/workflows/ci.yml@v1
     with:
       extra_jobs: |