Updated CHANGELOG.md

Author: konakonall

CHANGELOG.md

@@ -7,6 +7,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
+## [v0.7.28](https://github.com/tencentyun/cos-go-sdk-v5/compare/v0.7.27...v0.7.28) - 2021-07-21
+
+update context
+
+### Merged
+
+- update context [`#143`](https://github.com/tencentyun/cos-go-sdk-v5/pull/143)
+- update ctx [`#141`](https://github.com/tencentyun/cos-go-sdk-v5/pull/141)
+
+### Commits
+
+- Updated CHANGELOG.md [`925081a`](https://github.com/tencentyun/cos-go-sdk-v5/commit/925081ac2523e9e92ddd17c27fc5ab965b8e3648)
+
 ## [v0.7.27](https://github.com/tencentyun/cos-go-sdk-v5/compare/v0.7.26...v0.7.27) - 2021-06-25
 
 fix the go.mod