Pin reactotron-core-client temporarily

2.9.5 changed TS definitions to the point that some tests are now
failing. Pin for now to what was working, fix later.

Author: lindboe

boilerplate/package.json

@@ -90,7 +90,7 @@
     "postinstall-prepare": "1.0.1",
     "prettier": "^3.3.3",
     "react-test-renderer": "18.2.0",
-    "reactotron-core-client": "^2.8.13",
+    "reactotron-core-client": "2.9.4",
     "reactotron-mst": "^3.1.7",
     "reactotron-react-js": "^3.3.11",
     "reactotron-react-native": "^5.0.5",