Update CHANGELOG.md

Author: uttamukkoji

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## [1.1.0](https://github.com/contentstack/contentstack-utils-ruby/tree/v1.1.0) (2021-08-10)
+  - GQL Json rte to Html content support added
+
+## [1.0.2](https://github.com/contentstack/contentstack-utils-ruby/tree/v1.0.2) (2021-07-16)
+  - JSON RTE support added
 ## [1.0.1](https://github.com/contentstack/contentstack-utils-ruby/tree/v1.0.1) (2021-06-02)
   - Gemspec Dependency update