update CHANGELOG for version 0.6.1

Author: joshuadavidthomas

CHANGELOG.md

@@ -18,6 +18,8 @@ and this project attempts to adhere to [Semantic Versioning](https://semver.org/
 
 ## [Unreleased]
 
+## [0.6.1]
+
 ### Fixed
 
 - Fixed excessive memory usage in `AsyncWebhookView` and `SyncWebhookView` caused by creating a new `GitHubRouter` instance on each request.
@@ -100,11 +102,12 @@ and this project attempts to adhere to [Semantic Versioning](https://semver.org/
 
 - Josh Thomas <[email protected]> (maintainer)
 
-[unreleased]: https://github.com/joshuadavidthomas/django-github-app/compare/v0.6.0...HEAD
+[unreleased]: https://github.com/joshuadavidthomas/django-github-app/compare/v0.6.1...HEAD
 [0.1.0]: https://github.com/joshuadavidthomas/django-github-app/releases/tag/v0.1.0
 [0.2.0]: https://github.com/joshuadavidthomas/django-github-app/releases/tag/v0.2.0
 [0.2.1]: https://github.com/joshuadavidthomas/django-github-app/releases/tag/v0.2.1
 [0.3.0]: https://github.com/joshuadavidthomas/django-github-app/releases/tag/v0.3.0
 [0.4.0]: https://github.com/joshuadavidthomas/django-github-app/releases/tag/v0.4.0
 [0.5.0]: https://github.com/joshuadavidthomas/django-github-app/releases/tag/v0.5.0
 [0.6.0]: https://github.com/joshuadavidthomas/django-github-app/releases/tag/v0.6.0
+[0.6.1]: https://github.com/joshuadavidthomas/django-github-app/releases/tag/v0.6.1