chore: update scripts/update-rn.sh to v0.76.3

Author: web-flow

package.json

@@ -107,7 +107,7 @@
     "metro": "0.80.10",
     "prettier": "^2.0.5",
     "react": "18.2.0",
-    "react-native": "0.73.9",
+    "react-native": "0.76.3",
     "react-native-version": "^4.0.0",
     "react-test-renderer": "^18.2.0",
     "replace-in-file": "^7.0.1",