fix(deps): update react monorepo to v18

Author: renovate-bot

demo/package.json

@@ -24,8 +24,8 @@
     "gatsby": "next",
     "gatsby-source-filesystem": "next",
     "gatsby-transformer-remark": "next",
-    "react": "^17.0.1",
-    "react-dom": "^17.0.1"
+    "react": "^18.0.0",
+    "react-dom": "^18.0.0"
   },
   "devDependencies": {
     "@netlify/functions": "latest",