chore(deps): bump react-dom and @types/react-dom in /testsite

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) and [@types/react-dom](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react-dom). These dependencies needed to be updated together.

Updates `react-dom` from 19.1.1 to 19.2.0
- [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/v19.2.0/packages/react-dom)

Updates `@types/react-dom` from 19.1.11 to 19.2.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-dom)

---
updated-dependencies:
- dependency-name: react-dom
  dependency-version: 19.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: "@types/react-dom"
  dependency-version: 19.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

testsite/package-lock.json

@@ -24,15 +24,15 @@
     "json-schema-faker": "^0.5.9",
     "jsonpos": "^4.1.2",
     "react": "^19.1.1",
-    "react-dom": "^19.1.0",
+    "react-dom": "^19.2.0",
     "react-markdown": "^10.0.0",
     "react-toastify": "^11.0.3"
   },
   "devDependencies": {
     "@docusaurus/module-type-aliases": "3.9.1",
     "@docusaurus/tsconfig": "3.9.1",
     "@types/react": "^19.0.3",
-    "@types/react-dom": "^19.1.11",
+    "@types/react-dom": "^19.2.0",
     "typescript": "^5.6.2"
   },
   "browserslist": {