chore(deps): bump better-auth from 1.3.8 to 1.3.26

Bumps [better-auth](https://github.com/better-auth/better-auth/tree/HEAD/packages/better-auth) from 1.3.8 to 1.3.26.
- [Release notes](https://github.com/better-auth/better-auth/releases)
- [Commits](https://github.com/better-auth/better-auth/commits/v1.3.26/packages/better-auth)

---
updated-dependencies:
- dependency-name: better-auth
  dependency-version: 1.3.26
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package.json

@@ -67,7 +67,7 @@
     "@zxcvbn-ts/core": "3.0.4",
     "@zxcvbn-ts/language-common": "3.0.4",
     "@zxcvbn-ts/language-en": "3.0.2",
-    "better-auth": "1.3.8",
+    "better-auth": "1.3.26",
     "convex": "1.26.2",
     "convex-helpers": "0.1.104",
     "language-name-map": "0.3.0",