Revert samples/NativeModuleSample to match origin/main

Author: iamAbhi-916

samples/NativeModuleSample/cpp-lib/package.json

@@ -66,7 +66,7 @@
     "react": "19.0.0",
     "react-native": "0.78.0",
     "react-native-builder-bob": "^0.31.0",
-    "react-native-windows": "^0.79.0-preview.2",
+    "react-native-windows": "0.78.4",
     "typescript": "^5.2.2"
   },
   "resolutions": {