docs: add changelog entry for MCP schema fix

Author: jsourcebot

CHANGELOG.md

@@ -22,6 +22,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Upgraded `socket.io-parser` to `^4.2.7`. [#1542](https://github.com/sourcebot-dev/sourcebot/pull/1542)
 - Upgraded `fast-uri` to `^3.1.5`. [#1541](https://github.com/sourcebot-dev/sourcebot/pull/1541)
 - Upgraded `ip-address` to `^10.4.0`. [#1540](https://github.com/sourcebot-dev/sourcebot/pull/1540)
+- [EE] Fixed Ask MCP connector tools failing to load when their input schemas use JSON Schema 2019-09 or 2020-12. [#1547](https://github.com/sourcebot-dev/sourcebot/pull/1547)
 
 ## [5.1.5] - 2026-07-31