chore: avoid running Actions twice on PR (#2615)

* chore: avoid running Actions twice on PR

Refs: https://github.com/orgs/community/discussions/57827#discussioncomment-6579237

* chore: run once

Author: miketheman

.github/workflows/ci.yml

@@ -2,6 +2,8 @@ name: CI
 on: [push, pull_request]
 jobs:
   test:
+    # Avoid running CI more than once on pushes to main repo open PRs
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
     runs-on: ubuntu-latest
     services:
       postgres:

.github/workflows/static.yml

@@ -1,7 +1,9 @@
 name: Check collectstatic
 on: [push, pull_request]
 jobs:
-  test:
+  collectstatic:
+    # Avoid running CI more than once on pushes to main repo open PRs
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository