Update dependency next to v15.4.7 [SECURITY]

Author: renovate[bot]

package.json

@@ -48,7 +48,7 @@
     "ky": "^1.8.1",
     "lodash-es": "^4.17.21",
     "lucide-react": "^0.511.0",
-    "next": "15.3.2",
+    "next": "15.4.7",
     "nodemailer": "^7.0.3",
     "pagedjs": "^0.4.3",
     "payload": "3.37.0",