Bump react-router and react-router-dom in /react-playground

Bumps [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router) to 6.30.3 and updates ancestor dependency [react-router-dom](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router-dom). These dependencies need to be updated together.


Updates `react-router` from 6.26.2 to 6.30.3
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/[email protected]/packages/react-router/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/[email protected]/packages/react-router)

Updates `react-router-dom` from 6.26.2 to 6.30.3
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/main/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/[email protected]/packages/react-router-dom)

---
updated-dependencies:
- dependency-name: react-router
  dependency-version: 6.30.3
  dependency-type: indirect
- dependency-name: react-router-dom
  dependency-version: 6.30.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

react-playground/package-lock.json

@@ -12,7 +12,7 @@
     "react-dom": "^18.3.1",
     "react-js-pagination": "^3.0.3",
     "react-json-formatter": "^0.4.0",
-    "react-router-dom": "^6.26.2",
+    "react-router-dom": "^6.30.3",
     "wagmi": "^2.15.0"
   },
   "optionalDependencies": {