fix: upgrade next-themes from 0.2.1 to 0.3.0 (#127)

Snyk has created this PR to upgrade next-themes from 0.2.1 to 0.3.0.

See this package in npm:
https://www.npmjs.com/package/next-themes

See this project in Snyk:
https://app.snyk.io/org/kevinanielsen/project/55cd4508-19c3-493e-8177-9f0a08b7a331?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

package.json

@@ -39,7 +39,7 @@
     "lucide-react": "^0.344.0",
     "mongodb": "^6.2.0",
     "next": "latest",
-    "next-themes": "^0.2.1",
+    "next-themes": "^0.3.0",
     "react": "latest",
     "react-dom": "latest",
     "tailwind-merge": "^1.14.0",