Update changelog

Author: jekuaitk

CHANGELOG.md

@@ -7,11 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+* [PR-5](https://github.com/OS2web/os2web_key/pull/5)
+  Convert certificates when necessary.
 * [PR-4](https://github.com/OS2web/os2web_key/pull/4)
-  Added HashiCorp Vault key provider
+  Added HashiCorp Vault key provider.
 * [PR-2](https://github.com/OS2web/os2web_key/pull/2)
-  Updated documentation
+  Updated documentation.
 * [PR-1](https://github.com/OS2web/os2web_key/pull/1)
-  Added OS2Web key module
+  Added OS2Web key module.
 
 [Unreleased]: https://github.com/rimi-itk/os2web_key