Update dependency next to v15 [SECURITY]

Author: renovate[bot]

package.json

@@ -28,7 +28,7 @@
     "file-saver": "^2.0.5",
     "html2pdf.js": "^0.9.3",
     "lucide-react": "^0.447.0",
-    "next": "14.2.15",
+    "next": "15.5.13",
     "next-themes": "^0.3.0",
     "react": "^18",
     "react-dom": "^18",