fix(deps): update react monorepo to v19

Author: renovate[bot]

package-lock.json

@@ -50,9 +50,9 @@
     "next-sitemap": "4.2.3",
     "postcss": "8.5.10",
     "prop-types": "15.8.1",
-    "react": "18.3.1",
+    "react": "19.2.6",
     "react-copy-to-clipboard": "5.1.0",
-    "react-dom": "18.3.1",
+    "react-dom": "19.2.6",
     "react-icons": "5.5.0",
     "react-remove-scroll": "2.7.2",
     "react-syntax-highlighter": "15.6.6",