Fix incorrect links in changelog (#103)

Author: ihor-sviziev

CHANGELOG.md

@@ -50,7 +50,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 [Unreleased]: https://github.com/klaviyo/magento2-klaviyo/compare/2.1.0...HEAD
-[2.0.0]: https://github.com/klaviyo/magento2-klaviyo/compare/2.0.0...2.1.0
+[2.1.0]: https://github.com/klaviyo/magento2-klaviyo/compare/2.0.0...2.1.0
 [2.0.0]: https://github.com/klaviyo/magento2-klaviyo/compare/1.2.4...2.0.0
 [1.2.4]: https://github.com/klaviyo/magento2-klaviyo/compare/1.2.3...1.2.4
 [1.2.3]: https://github.com/klaviyo/magento2-klaviyo/compare/1.2.2...1.2.3