[CI] Disable UpdateCLI workflow on forks (elastic#196624)

## Summary

The UpdateCLI workflow is running against forks when it shouldn't be:

https://github.com/Ikuni17/kibana/actions/runs/11359905941

.github/workflows/updatecli-compose.yml

@@ -11,6 +11,7 @@ permissions:
 
 jobs:
   compose:
+    if: github.event.repository.fork == false
     runs-on: ubuntu-latest
     permissions:
       contents: write