fix(deps): update dependency next to v16

Author: renovate[bot]

pnpm-lock.yaml

@@ -38,7 +38,7 @@
     "jsdom": "^27.2.0",
     "jss": "^10.10.0",
     "mapshaper": "^0.6.113",
-    "next": "^15.5.6",
+    "next": "^16.1.1",
     "react": "^19.2.3",
     "react-dom": "^19.2.3",
     "react-feather": "^2.0.10",