Simplified JSON in curl request

Author: traut

.github/workflows/react-tests-dispatcher.yml

@@ -22,8 +22,8 @@ jobs:
             -d '{
               "ref": "github.event.pull_request.base.ref",
               "client_parameter": {
-                "pr_branch": "${{ github.event_name == 'pull_request' && github.event.pull_request.base.ref || github.ref_name }}"
+                "pr_branch": "${{ github.event.pull_request.base.ref }}"
                 "pr_id": "${{ github.event.number }}",
               }
             }'
-            return $?
+            exit $?