fix(deps): update dependency better-auth to v1.6.10

Author: renovate[bot]

playground/package.json

@@ -23,7 +23,7 @@
     "@nuxt/ui": "^4.5.0",
     "@nuxthub/core": "^0.10.6",
     "@nuxtjs/i18n": "^10.2.3",
-    "better-auth": "1.5.5",
+    "better-auth": "1.6.10",
     "nuxt": "^4.3.1",
     "nuxt-qrcode": "^0.4.10",
     "resend": "^6.12.2"