chore: bump react-dom from 19.2.0 to 19.2.1 in /site

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/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-dom
  dependency-version: 19.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

site/package-lock.json

@@ -25,7 +25,7 @@
     "clsx": "^2.1.1",
     "prism-react-renderer": "^2.4.1",
     "react": "^19.2.0",
-    "react-dom": "^19.2.0"
+    "react-dom": "^19.2.1"
   },
   "devDependencies": {
     "@babel/eslint-parser": "^7.28.5",