Update react monorepo to v18

Author: renovate[bot]

site/package.json

@@ -23,8 +23,8 @@
     "prism-react-renderer": "^2.0.0",
     "prism-themes": "^1.9.0",
     "prismjs-darcula-theme": "^1.0.3",
-    "react": "^17.0.2",
-    "react-dom": "^17.0.2",
+    "react": "^18.0.0",
+    "react-dom": "^18.0.0",
     "typescript": "^5.0.0"
   },
   "___dependencies": {