fix(deps): update nextjs monorepo to v15.4.1

Author: renovate[bot]

package.json

@@ -33,7 +33,7 @@
     "@octokit/rest": "22.0.0",
     "@vercel/analytics": "1.5.0",
     "geist": "1.4.2",
-    "next": "15.3.5",
+    "next": "15.4.1",
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "sonner": "2.0.6",
@@ -43,7 +43,7 @@
     "@igorkowalczyk/eslint-config": "3.1.0",
     "@igorkowalczyk/is-browser": "5.1.0",
     "@igorkowalczyk/prettier-config": "3.1.0",
-    "@next/bundle-analyzer": "15.3.5",
+    "@next/bundle-analyzer": "15.4.1",
     "@tailwindcss/aspect-ratio": "0.4.2",
     "@tailwindcss/postcss": "^4.1.11",
     "@types/node": "24.0.14",