fix: upgrade next from 15.1.8 to 15.3.1

Snyk has created this PR to upgrade next from 15.1.8 to 15.3.1.

See this package in npm:
next

See this project in Snyk:
https://app.snyk.io/org/sammytezzy/project/29946380-fb5a-4fc9-b663-5f6de44551b2?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

examples/next-forms/package.json

@@ -7,7 +7,7 @@
     "lint": "next lint"
   },
   "dependencies": {
-    "next": "latest",
+    "next": "15.3.1",
     "react": "18.2.0",
     "react-dom": "18.2.0"
   },