ci: temporarily trigger smoke-jp on feature branch for validation

Will revert before merging. Lets us run the JP smoke workflow against the
JP test account without first merging the workflow file to main (which
GitHub Actions requires for workflow_dispatch registration).

Author: pranav-new-relic

.github/workflows/smoke-jp.yml

@@ -3,7 +3,7 @@ name: Smoke Tests (JP)
 on:
   workflow_dispatch:
   push:
-    branches: [main]
+    branches: [main, feature/jp-region-tests]
 
 jobs:
   log-context: