updates changelog

CHANGELOG.md

@@ -25,11 +25,20 @@ and uses [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 -
 
 -->
+------
+## [v6.7.2](https://github.com/asfadmin/Discovery-asf_search/compare/v6.7.1...v6.7.2)
+### Adds
+- Adds constants for `dataset` keyword, under `asf_search.DATASET`
+
+### Changed
+- Constants are no longer top level import, are now accessible through respective modules
+
 ------
 ## [v6.7.1](https://github.com/asfadmin/Discovery-asf_search/compare/v6.7.0...v6.7.1)
 ### Fixed
 - Fixes issue with certain S1 products not stacking properly in certain environments, which caused null `perpendicularBaseline` values
 
+------
 ## [v6.7.0](https://github.com/asfadmin/Discovery-asf_search/compare/v6.6.3...v6.7.0)
 ### Added
 - Adds new `dataset` keyword to `search()` as an alternative to `platform`. Allows users to get results from multiple platforms at once in a single page