Bump react from 18.2.0 to 18.3.1 in /website (#226)

Bumps [react](https://github.com/facebook/react/tree/HEAD/packages/react) from 18.2.0 to 18.3.1.
- [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/v18.3.1/packages/react)

---
updated-dependencies:
- dependency-name: react
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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website/package.json

@@ -19,7 +19,7 @@
         "@mdx-js/react": "^3.0.1",
         "clsx": "^2.1.0",
         "prism-react-renderer": "^2.3.1",
-        "react": "^18.0.0",
+        "react": "^18.3.1",
         "react-dom": "^18.0.0",
         "rehype-katex": "^7.0.0",
         "remark-math": "^6.0.0"