Add changelog entry

Author: lfrancke

CHANGELOG.md

@@ -7,8 +7,10 @@ All notable changes to this project will be documented in this file.
 ### Changed
 
 - Bump okio to 1.17.6 to get rid of CVE-2023-3635 ([#46])
+- Performance fixes ([#50#])
 
 [#46]: https://github.com/stackabletech/hdfs-utils/pull/46
+[#50]: https://github.com/stackabletech/hdfs-utils/pull/50 
 
 ## [0.3.0] - 2024-07-04