fix: example/package.json & example/yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BABELRUNTIME-10044504

Author: snyk-bot

example/package.json

@@ -9,10 +9,10 @@
     "web": "expo start --web"
   },
   "dependencies": {
-    "expo": "~49.0.8",
+    "expo": "~51.0.0",
     "expo-status-bar": "~1.6.0",
     "react": "18.2.0",
-    "react-native": "0.72.4",
+    "react-native": "0.73.0",
     "react-dom": "18.2.0",
     "react-native-web": "~0.19.6"
   },