Fix OpenAPI workflow publishing pull request artifact as unstable specification

.github/workflows/ci-openapi.yml

@@ -141,7 +141,7 @@ jobs:
   publish:
     name: OpenAPI - Publish Unstable Spec
     if: |
-      github.event_name != 'pull_request' && 
+      github.event_name != 'pull_request_target' && 
       contains(github.repository_owner, 'jellyfin')
     runs-on: ubuntu-latest
     needs: