Fix CI for forks (#3226)

* Try with a different condition for forks

* Skip danger in forks, the fallback token won't let it write comments in PRs anyway

.github/workflows/sync-sas-strings.yml

@@ -9,7 +9,7 @@ jobs:
   sync-sas-strings:
     runs-on: ubuntu-latest
     # Skip in forks
-    if: github.repository == 'element-hq/element-x-android'
+    if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == 'element-hq/element-x-android' }}
     # No concurrency required, runs every time on a schedule.
     steps:
       - uses: actions/checkout@v4