Update CHANGELOG.md

Author: rcaril

CHANGELOG.md

@@ -3,10 +3,15 @@
 ## [Unreleased]
 
 ### Breaking:
+- breaking(kvstoreentry): The 'describe' command now returns only key attributes (ie: generation, metadata) instead of a given key's value ([#1529](https://github.com/fastly/cli/pull/1529))
 
 ### Enhancements:
 - feat(logging): Add support for 'CompressionCodec' and 'GzipLevel' attribute to the HTTPS endpoint.
 - feat(kvstoreentry): Add support for the 'prefix' parameter for List operations ([#1526](https://github.com/fastly/cli/pull/1526))
+- feat(kvstoreentry): Add support for the add, append, prepend, metadata, if_generation_match, and background_fetch 'create' command operations ([#1529](https://github.com/fastly/cli/pull/1529))
+- feat(kvstoreentry): Add support for the if_generation_match and metadata 'describe' command operations ([#1529](https://github.com/fastly/cli/pull/1529))
+- feat(kvstoreentry): Add support for the if_generation_match and force 'delete' command operations ([#1529](https://github.com/fastly/cli/pull/1529))
+- feat(kvstoreentry): Add support for the if_generation_match 'get' command operation ([#1529](https://github.com/fastly/cli/pull/1529))
 
 ### Bug fixes: