docs: add changelog entry for PR 1550

Author: brendan-kellam

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - [EE] Added one-hour repository-scoped access tokens with public mint and revoke APIs. [#1549](https://github.com/sourcebot-dev/sourcebot/pull/1549)
 - [EE] Added guided reconnection for MCP connector authentication failures during Ask Sourcebot agent turns. [#1548](https://github.com/sourcebot-dev/sourcebot/pull/1548)
+- Added public connection listing and connection-based repository filtering APIs. [#1550](https://github.com/sourcebot-dev/sourcebot/pull/1550)
 
 ### Removed
 - Removed the Langfuse integration. [#1536](https://github.com/sourcebot-dev/sourcebot/pull/1536)