Updated CHANGELOG.md for 1.21.14 release

Author: bUnitBot

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.21.15] - 2021-04-24
+
 asdfasdf asdf asdf asdf asdf
 
 ## [1.20.55] - 2021-04-24
@@ -201,7 +203,9 @@ more of that
 
 -   Something was added.
 
-[Unreleased]: https://github.com/bUnit-dev/workflows/compare/v1.20.55...HEAD
+[Unreleased]: https://github.com/bUnit-dev/workflows/compare/v1.21.15...HEAD
+
+[1.21.15]: https://github.com/bUnit-dev/workflows/compare/v1.20.55...v1.21.15
 
 [1.20.55]: https://github.com/bUnit-dev/workflows/compare/v1.20.52...v1.20.55