DOC: Update changelog

The "Changed" section is reserved for API changes only.  This is rather a fix.

CHANGELOG.md

@@ -14,9 +14,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed ###
 
-- Improved `compare_entities` function, especially for unsuppored mulit-properties.
-  Updated the documentation and added more unit tests.
-
 ### Deprecated ###
 
 - getOriginUrlIn, getDiffIn, getBranchIn, getCommitIn (formerly apiutils) have been
@@ -25,7 +22,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Removed ###
 
 ### Fixed ###
+
 - Fixed `src/caosdb/utils/checkFileSystemConsistency.py`
+- `compare_entities` now corretly raises a `NotImplementedError` in case of
+  comparing two `Property` entities or in case of entities with multi
+  properties.
 
 ### Security ###