docs: prepare CHANGELOG.md for the release

Author: chris-doehring

CHANGELOG.md

@@ -1,10 +1,10 @@
 # Changelog
 
-## v2.0.0 - 2021-07-XX
+## v2.0.0 - 2021-07-12
 
 - require `dogado/json-api-common:^2.0`
 
-See [json-api-common changelog](https://github.com/dogado-group/json-api-common/blob/v2.0.0/CHANGELOG.md) for further details.
+See [json-api-common changelog](https://github.com/dogado-group/json-api-common/blob/v2.0.0/CHANGELOG.md) for more details.
 
 ## v1.1.0 - 2021-07-10