Add link to v0.1.0

Author: aaron-lane

CHANGELOG.md

@@ -14,14 +14,15 @@ and this project adheres to [Semantic Versioning][semver-site].
 
 - Ability to specify a service account for functions to run as
 
-## 0.1.0 - 2018-08-08
+## [0.1.0] - 2018-08-08
 
 ### Added
 
 - Initial release
 
 [Unreleased]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/compare/v0.2.0...HEAD
 [0.2.0]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/compare/v0.1.0...v0.2.0
+[0.1.0]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/releases/tag/v0.1.0
 
 [keepachangelog-site]: https://keepachangelog.com/en/1.0.0/
 [semver-site]: https://semver.org/spec/v2.0.0.html