chore: document GitHub App sync failure behavior

Author: brendan-kellam

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - [EE] Fixed worker startup races that could disable GitHub App authentication and permission syncing until restart after an online license refresh. [#1454](https://github.com/sourcebot-dev/sourcebot/pull/1454)
+- [EE] Fixed GitHub connection sync jobs to fail safely when GitHub App authentication is configured without the required entitlement. [#1454](https://github.com/sourcebot-dev/sourcebot/pull/1454)
 
 ## [5.1.1] - 2026-07-14