Update CHANGELOG.md

Co-authored-by: Lukas Koch <lukas.koch@mailbox.org>

Author: thecuriousneutrino

CHANGELOG.md

@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
 - Basepath string for IN2P3-CC-XRD-tape and IN2P3-CC-XRD-disk is corrected (// is replaced with / for an exact string match with the host name string).
 - BackendException for cases where the get_SE method returns None because the host name string is not contained inside the file URL are added.