Update CHANGELOG.md

Author: jfy133

CHANGELOG.md

@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### `Added`
 
 ### `Fixed`
-- `bwa_index` doc update [#725](https://github.com/nf-core/eager/pull/725)
+- [#725](https://github.com/nf-core/eager/pull/725) `bwa_index` doc update 
 
 ### `Dependencies`