chore(deps): bump react and @types/react in /extensions/react-widget

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

Updates `react` from 18.3.1 to 19.2.5
- [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/v19.2.5/packages/react)

Updates `@types/react` from 18.3.3 to 19.2.14
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react)

---
updated-dependencies:
- dependency-name: react
  dependency-version: 19.2.5
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@types/react"
  dependency-version: 19.2.14
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

extensions/react-widget/package.json

@@ -54,7 +54,7 @@
     "dompurify": "^3.1.5",
     "flow-bin": "^0.309.0",
     "markdown-it": "^14.1.0",
-    "react": "^18.2.0",
+    "react": "^19.2.5",
     "react-dom": "^18.2.0",
     "styled-components": "^6.1.8"
   },
@@ -67,7 +67,7 @@
     "@parcel/transformer-typescript-types": "^2.16.4",
     "@types/dompurify": "^3.0.5",
     "@types/markdown-it": "^14.1.2",
-    "@types/react": "^18.3.3",
+    "@types/react": "^19.2.14",
     "@types/react-dom": "^18.3.0",
     "@typescript-eslint/eslint-plugin": "^8.57.2",
     "@typescript-eslint/parser": "^8.57.2",