Update react monorepo to v19

Author: renovate[bot]

package.json

@@ -33,8 +33,8 @@
     "gatsby-transformer-sharp": "4.23.0",
     "netlify-cms-app": "2.15.72",
     "prismjs": "1.29.0",
-    "react": "17.0.2",
-    "react-dom": "17.0.2",
+    "react": "19.1.0",
+    "react-dom": "19.1.0",
     "react-helmet": "6.1.0",
     "typescript": "4.8.3"
   },