[Playground dependencies]: Bump the dependencies-prod group

Bumps the dependencies-prod group in /playground with 2 updates: [react](https://github.com/facebook/react/tree/HEAD/packages/react) and [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom).


Updates `react` from 19.2.0 to 19.2.1
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v19.2.1/packages/react)

Updates `react-dom` from 19.2.0 to 19.2.1
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v19.2.1/packages/react-dom)

---
updated-dependencies:
- dependency-name: react
  dependency-version: 19.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies-prod
- dependency-name: react-dom
  dependency-version: 19.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies-prod
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

playground/package.json

@@ -25,8 +25,8 @@
     "monaco-editor": "^0.55.1",
     "postcss": "^8.4.31",
     "postcss-rtlcss": "^5.7.1",
-    "react": "^19.2.0",
-    "react-dom": "^19.2.0",
+    "react": "^19.2.1",
+    "react-dom": "^19.2.1",
     "react-github-btn": "^1.4.0"
   },
   "devDependencies": {