docs: add PR link to CHANGELOG entry for askgithub toast fix

Co-authored-by: Michael Sukkarieh <msukkari@users.noreply.github.com>

Author: github-actions[bot]

CHANGELOG.md

@@ -12,7 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added Bitbucket Cloud OAuth identity provider support (`provider: "bitbucket-cloud"`) for SSO and account-linked permission syncing. [#924](https://github.com/sourcebot-dev/sourcebot/pull/924)
 
 ### Changed
-- Hide version upgrade toast for askgithub deployment (`EXPERIMENT_ASK_GH_ENABLED`).
+- Hide version upgrade toast for askgithub deployment (`EXPERIMENT_ASK_GH_ENABLED`). [#931](https://github.com/sourcebot-dev/sourcebot/pull/931)
 
 ### Fixed
 - Fixed text inside angle brackets (e.g., `<id>`) being hidden in chat prompt display due to HTML parsing. [#929](https://github.com/sourcebot-dev/sourcebot/pull/929)