docs(changelog): reference issue in changelog entry

It helps in the release notes.

Author: naveensingh

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Fixed
-- Fixed inconsistent checklist sorting when the "Move checked items to the bottom" option is enabled
+- Fixed inconsistent checklist sorting when the "Move checked items to the bottom" option is enabled ([#59])
 
 ## [1.6.0] - 2025-10-29
 ### Changed
@@ -94,6 +94,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Initial release
 
+[#59]: https://github.com/FossifyOrg/Notes/issues/59
 [#81]: https://github.com/FossifyOrg/Notes/issues/81
 [#83]: https://github.com/FossifyOrg/Notes/issues/83
 [#99]: https://github.com/FossifyOrg/Notes/issues/99