fix CHANGELOG

Author: eheydrick

CHANGELOG.md

@@ -51,7 +51,8 @@ This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachang
 ### Added
 - initial release
 
-[Unreleased]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/0.1.0...HEAD
+[Unreleased]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/0.1.1...HEAD
+[0.1.1]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/0.1.0...0.1.1
 [0.1.0]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/0.0.7...0.1.0
 [0.0.7]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/0.0.6...0.0.7
 [0.0.6]: https://github.com/sensu-plugins/sensu-plugins-postgres/compare/0.0.5...0.0.6