Updates changelog

Author: nunomaduro

CHANGELOG.md

@@ -6,7 +6,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 # Release Notes
 
-## [2.0b1](https://github.com/algolia/algoliasearch-client-python/compare/1.28.0...2.2b1)
+## [2.0.0b1](https://github.com/algolia/algoliasearch-client-python/compare/1.28.0...2.0.0b1)
 
 ### Changed
 - Major version - [Upgrade Guide](https://www.algolia.com/doc/api-client/getting-started/upgrade-guides/python)