ci: bump better-auth

Bumps the npm_and_yarn group with 1 update in the /apps/sim directory: [better-auth](https://github.com/better-auth/better-auth/tree/HEAD/packages/better-auth).


Updates `better-auth` from 1.6.27 to 1.7.7
- [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/v1.7.7/packages/better-auth)

---
updated-dependencies:
- dependency-name: better-auth
  dependency-version: 1.7.7
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

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

Author: dependabot[bot]

apps/sim/package.json

@@ -183,7 +183,7 @@
     "@xyflow/react": "12.12.0",
     "ajv": "8.20.0",
     "archiver": "8.0.0",
-    "better-auth": "1.6.27",
+    "better-auth": "1.7.7",
     "binary-extensions": "3.1.0",
     "browser-image-compression": "^2.0.2",
     "busboy": "1.6.0",