Update dependency next to v15.4.8 [SECURITY]

Author: renovate[bot]

package.json

@@ -43,7 +43,7 @@
         "js-cookie": "3.0.5",
         "lucide-react": "0.479.0",
         "modern-normalize": "3.0.1",
-        "next": "15.3.6",
+        "next": "15.4.8",
         "pino": "9.6.0",
         "react": "19.2.1",
         "react-dom": "19.2.1",