fix(deps): update nextjs monorepo to v15.5.9

Author: renovate[bot]

package.json

@@ -28,7 +28,7 @@
     "feed": "^5.0.0",
     "hono": "^4.11.3",
     "lucide-react": "^0.562.0",
-    "next": "15.4.10",
+    "next": "15.5.9",
     "next-contentlayer2": "^0.5.8",
     "postcss": "8.5.6",
     "react": "19.2.3",
@@ -47,15 +47,15 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.3",
     "@eslint/js": "^9.39.2",
-    "@next/bundle-analyzer": "15.4.10",
+    "@next/bundle-analyzer": "15.5.9",
     "@next/eslint-plugin-next": "^15.5.9",
     "@types/node": "^22.19.3",
     "@types/react": "19.2.7",
     "@types/react-dom": "19.2.3",
     "@typescript-eslint/eslint-plugin": "^8.52.0",
     "@typescript-eslint/parser": "^8.52.0",
     "eslint": "^9.39.2",
-    "eslint-config-next": "15.4.10",
+    "eslint-config-next": "15.5.9",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.32.0",
     "eslint-plugin-react": "^7.37.5",