add changelog entry

Author: Michael Büßemeyer

CHANGELOG.unreleased.md

@@ -24,6 +24,7 @@ For upgrade instructions, please check the [migration guide](MIGRATIONS.released
 
 ### Fixed
 - Fix performance bottleneck when deleting a lot of trees at once. [#8176](https://github.com/scalableminds/webknossos/pull/8176)
+- Fix that listing datasets with the `api/datasets` route without compression failed due to missing permissions regarding public datasets. [#8249](https://github.com/scalableminds/webknossos/pull/8249)
 - Fix a bug where changing the color of a segment via the menu in the segments tab would update the segment color of the previous segment, on which the context menu was opened. [#8225](https://github.com/scalableminds/webknossos/pull/8225)
 - Fix a bug when importing an NML with groups when only groups but no trees exist in an annotation. [#8176](https://github.com/scalableminds/webknossos/pull/8176)
 - Fix a bug where trying to delete a non-existing node (via the API, for example) would delete the whole active tree. [#8176](https://github.com/scalableminds/webknossos/pull/8176)