Update react monorepo to v19

Author: renovate[bot]

website/package.json

@@ -17,8 +17,8 @@
     "@docusaurus/preset-classic": "3.5.2",
     "@mdx-js/react": "^3.0.0",
     "clsx": "^2.0.0",
-    "react": "^18.0.0",
-    "react-dom": "^18.0.0"
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
   },
   "browserslist": {
     "production": [