fix(deps): update dependency next to v16

Author: renovate[bot]

package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@socialgouv/matomo-next": "^1.2.2",
     "babel-plugin-styled-components": "^1.12.1",
-    "next": "^14.2.25",
+    "next": "^16.0.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1"
   },