increasing wait time for publish to avoid races (#8950)

Author: joehan

scripts/publish/cloudbuild.yaml

@@ -105,7 +105,7 @@ steps:
 
   # Wait a bit of time for npm to catch up.
   - name: "gcr.io/$PROJECT_ID/package-builder"
-    args: ["sleep", "60"]
+    args: ["sleep", "240"]
 
   # Set up the hub credentials for firepit-builder.
   - name: "gcr.io/$PROJECT_ID/firepit-builder"