fix(deps): update dependency better-auth to v1.3.14

Author: renovate[bot]

packages/auth/package.json

@@ -31,7 +31,7 @@
     "@acme/db": "workspace:*",
     "@better-auth/stripe": "1.3.14",
     "@t3-oss/env-nextjs": "^0.13.6",
-    "better-auth": "1.3.9",
+    "better-auth": "1.3.14",
     "zod": "^3.25.71"
   },
   "devDependencies": {