Update unit.yml

Author: michaelnchin

.github/workflows/unit.yml

@@ -1,16 +1,10 @@
 name: Unit Tests
 
-on:
-  push:
-    branches:
-      - '**'
-  pull_request:
-    branches:
-      - main
+on: [push, pull_request]
 
 jobs:
   unit-tests:
-    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.event.pull_request.base.repo.full_name
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.fork == true
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2