add changelog entry

CHANGELOG.unreleased.md

@@ -26,6 +26,7 @@ For upgrade instructions, please check the [migration guide](MIGRATIONS.released
 - A "Locked by anonymous user" banner is no longer shown when opening public editable annotations of other organizations. [#8273](https://github.com/scalableminds/webknossos/pull/8273)
 - Fixed a bug that uploading a zarr dataset with an already existing `datasource-properties.json` file failed. [#8268](https://github.com/scalableminds/webknossos/pull/8268)
 - Fixed the organization switching feature for datasets opened via old links. [#8257](https://github.com/scalableminds/webknossos/pull/8257)
+- Fixed that uploading an NML file without an organization id failed. Now the user's organization is used as fallback. [#8277](https://github.com/scalableminds/webknossos/pull/8277)
 - Fixed that the frontend did not ensure a minium length for annotation layer names. Moreover, names starting with a `.` are also disallowed now. [#8244](https://github.com/scalableminds/webknossos/pull/8244)
 - Fixed a bug where in the add remote dataset view the dataset name setting was not in sync with the datasource setting of the advanced tab making the form not submittable. [#8245](https://github.com/scalableminds/webknossos/pull/8245)
 - Fix read and update dataset route for versions 8 and lower. [#8263](https://github.com/scalableminds/webknossos/pull/8263)