docs: Update changelog

Author: epage

clap_complete/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 <!-- next-header -->
 ## [Unreleased] - ReleaseDate
 
+### Fixes
+
+- *(bash)* Improve compatibility with older bash versions
+
 ## [4.5.1] - 2024-02-16
 
 ### Fixes