fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - react from 18.2.0 to 18.3.1.
    See this package in npm: https://www.npmjs.com/package/react
  - react-dom from 18.2.0 to 18.3.1.
    See this package in npm: https://www.npmjs.com/package/react-dom
  - @types/mdx from 2.0.3 to 2.0.13.
    See this package in npm: https://www.npmjs.com/package/@types/mdx
  - @types/node from 18.11.18 to 18.19.48.
    See this package in npm: https://www.npmjs.com/package/@types/node
  - @types/react from 18.0.27 to 18.3.5.
    See this package in npm: https://www.npmjs.com/package/@types/react
  - @types/react-dom from 18.0.10 to 18.3.0.
    See this package in npm: https://www.npmjs.com/package/@types/react-dom

See this project in Snyk:
https://app.snyk.io/org/sammytezzy/project/0b5526cd-23ab-4885-bc8e-6a6e935a112f?utm_source=github&utm_medium=referral&page=upgrade-pr

examples/app-dir-mdx/package.json

@@ -7,13 +7,13 @@
   },
   "dependencies": {
     "@next/mdx": "latest",
-    "@types/mdx": "2.0.3",
-    "@types/node": "18.11.18",
-    "@types/react": "18.0.27",
-    "@types/react-dom": "18.0.10",
+    "@types/mdx": "2.0.13",
+    "@types/node": "18.19.48",
+    "@types/react": "18.3.5",
+    "@types/react-dom": "18.3.0",
     "next": "latest",
-    "react": "18.2.0",
-    "react-dom": "18.2.0",
+    "react": "18.3.1",
+    "react-dom": "18.3.1",
     "typescript": "4.9.5"
   }
 }