fix(deps): update dependency next to v15.5.6

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
     "clsx": "2.1.1",
     "date-fns": "4.1.0",
     "nanoid": "5.1.6",
-    "next": "15.4.0-canary.61",
+    "next": "15.5.6",
     "next-auth": "5.0.0-beta.25",
     "numbro": "2.5.0",
     "react": "19.1.1",