ci: added environment to test job

Author: desusai7

.github/workflows/main.yml

@@ -23,6 +23,7 @@ jobs:
     test:
         needs: authorize # Require approval before running on forked pull requests
         name: Test on ${{ matrix.platform.os }} using Xcode ${{ matrix.xcode }}
+        environment: ${{ github.event.pull_request.head.repo.fork && 'external' || 'internal' }}
         runs-on: macos-13
 
         env: