other: fix changelog typo

Author: ClementTsang

CHANGELOG.md

@@ -18,7 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Other
 
-- [1220](https://github.com/ClementTsang/bottom/pull/1220): Update documentation for features supporting human times.
+- [#1220](https://github.com/ClementTsang/bottom/pull/1220): Update documentation for features supporting human times.
 
 ## [0.9.2] - 2023-06-11