Add a pull_request trigger to the Deploy to Production workflow to catch merges into staging via pull requests

Author: elainefan331

.github/workflows/build-deploy-neurojsonio.yml

@@ -4,6 +4,9 @@ on:
   push:
     branches:
       - staging
+  pull_request:
+    branches:
+      - staging
 
 jobs:
   deploy: