build(deps-dev): bump @types/react-dom in /website

Bumps [@types/react-dom](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react-dom) from 18.2.20 to 18.2.21.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-dom)

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

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

website/package.json

@@ -40,7 +40,7 @@
     "@types/node": "^20.11.24",
     "@types/openpgp": "^4.4.22",
     "@types/react": "^18.2.63",
-    "@types/react-dom": "^18.2.20",
+    "@types/react-dom": "^18.2.21",
     "@types/react-dropzone": "^5.1.0",
     "@types/react-router-dom": "^5.3.3",
     "@vitejs/plugin-react": "^4.2.1",

website/yarn.lock

@@ -1032,10 +1032,10 @@
   resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.7.11.tgz#2596fb352ee96a1379c657734d4b913a613ad563"
   integrity sha512-ga8y9v9uyeiLdpKddhxYQkxNDrfvuPrlFb0N1qnZZByvcElJaXthF1UhvCh9TLWJBEHeNtdnbysW7Y6Uq8CVng==
 
-"@types/react-dom@^18.2.20":
-  version "18.2.20"
-  resolved "https://registry.yarnpkg.com/@types/react-dom/-/react-dom-18.2.20.tgz#cbdf7abb3cc2377980bb1294bc51375016a8320f"
-  integrity sha512-HXN/biJY8nv20Cn9ZbCFq3liERd4CozVZmKbaiZ9KiKTrWqsP7eoGDO6OOGvJQwoVFuiXaiJ7nBBjiFFbRmQMQ==
+"@types/react-dom@^18.2.21":
+  version "18.2.21"
+  resolved "https://registry.yarnpkg.com/@types/react-dom/-/react-dom-18.2.21.tgz#b8c81715cebdebb2994378616a8d54ace54f043a"
+  integrity sha512-gnvBA/21SA4xxqNXEwNiVcP0xSGHh/gi1VhWv9Bl46a0ItbTT5nFY+G9VSQpaG/8N/qdJpJ+vftQ4zflTtnjLw==
   dependencies:
     "@types/react" "*"