update changelog (#66)

CHANGELOG.md

@@ -6,6 +6,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+## [2.1.0] - 2021-10-28
+
+- Updated rails dependency and fix the template deprecation in
+  [65](https://github.com/OSC/ood_appkit/pull/65).
+
 ## [2.0.2] - 2021-10-25
 
 ## Fixed
@@ -56,7 +61,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Security fix: Cookies are kept within the Passenger app's base URI now.
   [#42](https://github.com/OSC/ood_appkit/pull/42)
 
-[Unreleased]: https://github.com/OSC/ood_appkit/compare/v2.0.2...HEAD
+[Unreleased]: https://github.com/OSC/ood_appkit/compare/v2.1.0...HEAD
+[2.1.0]: https://github.com/OSC/ood_appkit/compare/v2.0.2...v2.1.0
 [2.0.2]: https://github.com/OSC/ood_appkit/compare/v2.0.1...v2.0.2
 [2.0.1]: https://github.com/OSC/ood_appkit/compare/v2.0.0...v2.0.1
 [2.0.0]: https://github.com/OSC/ood_appkit/compare/v1.1.4...v2.0.0