fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - react from 18.2.0 to 18.3.0.
    See this package in npm: https://www.npmjs.com/package/react
  - react-dom from 18.2.0 to 18.3.0.
    See this package in npm: https://www.npmjs.com/package/react-dom

See this project in Snyk:
https://app.snyk.io/org/sammytezzy/project/dca2e9c3-af28-4092-95db-059fac7d1940?utm_source=github&utm_medium=referral&page=upgrade-pr

apps/playgrounds/gatsby/package.json

@@ -13,8 +13,8 @@
     "dotenv": "16.0.0",
     "gatsby": "5.8.0-next.3",
     "next-auth": "workspace:*",
-    "react": "18.2.0",
-    "react-dom": "18.2.0"
+    "react": "18.3.0",
+    "react-dom": "18.3.0"
   },
   "devDependencies": {
     "vercel": "23.1.2"