Bump better-auth from 1.6.20 to 1.6.23

Bumps [better-auth](https://github.com/better-auth/better-auth/tree/HEAD/packages/better-auth) from 1.6.20 to 1.6.23.
- [Release notes](https://github.com/better-auth/better-auth/releases)
- [Changelog](https://github.com/better-auth/better-auth/blob/main/packages/better-auth/CHANGELOG.md)
- [Commits](https://github.com/better-auth/better-auth/commits/v1.6.23/packages/better-auth)

---
updated-dependencies:
- dependency-name: better-auth
  dependency-version: 1.6.23
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -20,7 +20,7 @@
     "@neondatabase/serverless": "^1.1.0",
     "@xterm/addon-fit": "^0.11.0",
     "@xterm/xterm": "^6.0.0",
-    "better-auth": "^1.6.20",
+    "better-auth": "^1.6.23",
     "drizzle-orm": "^0.45.2",
     "js-yaml": "^5.1.0",
     "next": "16.2.9",