fix(deps): update nextjs monorepo to v16.1.6

Author: renovate[bot]

package.json

@@ -20,8 +20,8 @@
     "@hbsnow/rehype-sectionize": "1.0.7",
     "@mdx-js/loader": "^3.1.1",
     "@mdx-js/react": "^3.1.1",
-    "@next/bundle-analyzer": "16.1.1",
-    "@next/mdx": "16.1.1",
+    "@next/bundle-analyzer": "16.1.6",
+    "@next/mdx": "16.1.6",
     "codehike": "1.0.7",
     "dayjs": "^1.11.19",
     "jotai": "^2.16.0",
@@ -40,7 +40,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.39.2",
-    "@next/eslint-plugin-next": "16.1.1",
+    "@next/eslint-plugin-next": "16.1.6",
     "@tailwindcss/postcss": "^4.1.18",
     "@types/mdx": "^2.0.13",
     "@types/node": "^25.0.3",