update changelog for 0.8.0 release (#342)

* update changelog for 0.8.0 release

* Update Changelog.md

Author: jstriebel

Changelog.md

@@ -7,7 +7,19 @@ and this project adheres to [Calendar Versioning](http://calver.org/) `0Y.0M.MIC
 For upgrade instructions, please check the respective *Breaking Changes* sections.
 
 ## Unreleased
-[Commits](https://github.com/scalableminds/webknossos-cuber/compare/v0.7.0...HEAD)
+[Commits](https://github.com/scalableminds/webknossos-cuber/compare/v0.8.0...HEAD)
+
+### Breaking Changes in Config & CLI
+
+### Added
+
+### Changed
+
+### Fixed
+
+
+## [0.8.0](https://github.com/scalableminds/webknossos-cuber/releases/tag/v0.8.0) - 2021-07-16
+[Commits](https://github.com/scalableminds/webknossos-cuber/compare/v0.7.0...v0.8.0)
 
 ### Breaking Changes in Config & CLI
 - Some breaking changes in the dataset API: [#339](https://github.com/scalableminds/webknossos-cuber/pull/339)
@@ -21,12 +33,6 @@ For upgrade instructions, please check the respective *Breaking Changes* section
   - The `Layer` does now expose the `largest_segment_id`.
   - Add methods to get category specific layers for a given dataset.
 
-
-### Changed
-
-### Fixed
-
-
 ## [0.7.0](https://github.com/scalableminds/webknossos-cuber/releases/tag/v0.7.0) - 2021-07-08
 [Commits](https://github.com/scalableminds/webknossos-cuber/compare/v0.6.8...v0.7.0)