Update dependency next to v16.2.6

Author: renovate[bot]

package.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "@upleveled/ley": "1.0.0",
     "dotenv-safe": "9.1.0",
-    "next": "16.2.5",
+    "next": "16.2.6",
     "postgres": "3.4.9",
     "react": "19.2.6",
     "react-dom": "19.2.6",