don't run merge and deploy on PRs for FTL build

Signed-off-by: Adam Warner <[email protected]>

.github/workflows/ftl-build.yml

@@ -143,6 +143,7 @@ jobs:
   # If we would push immediately above, the individual runners would overwrite each other's images
   # https://docs.docker.com/build/ci/github-actions/multi-platform/#distribute-build-across-multiple-runners
   merge-and-deploy:
+    if: github.event_name != 'pull_request'
     runs-on: ubuntu-latest
     needs:
       - build-and-test