CHANGELOG: add 5.22.1 in the list of releases

Author: groue

CHANGELOG.md

@@ -7,7 +7,7 @@ GRDB adheres to [Semantic Versioning](https://semver.org/), with one exception:
 
 #### 5.x Releases
 
-- `5.22.x` Releases - [5.22.0](#5220)
+- `5.22.x` Releases - [5.22.0](#5220) | [5.22.1](#5221)
 - `5.21.x` Releases - [5.21.0](#5210)
 - `5.20.x` Releases - [5.20.0](#5200)
 - `5.19.x` Releases - [5.19.0](#5190)