Added 0.9.1 release note

CHANGELOG.md

@@ -2,6 +2,12 @@
 All notable changes to this project will be documented in this file.  
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.9.1] - 2017-07-30
+
+### Fixed
+
+- `${super.toString()}` linting (`string-template` rule) ([#69](https://github.com/shyiko/ktlint/issues/69)). 
+
 ## [0.9.0] - 2017-07-23
 
 ### Added
@@ -169,6 +175,7 @@ set in `[*{kt,kts}]` section).
 
 ## 0.1.0 - 2016-07-27
 
+[0.9.1]: https://github.com/shyiko/ktlint/compare/0.9.0...0.9.1
 [0.9.0]: https://github.com/shyiko/ktlint/compare/0.8.3...0.9.0
 [0.8.3]: https://github.com/shyiko/ktlint/compare/0.8.2...0.8.3
 [0.8.2]: https://github.com/shyiko/ktlint/compare/0.8.1...0.8.2