Update CHANGELOG for v1.0.0.2

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -1,8 +1,8 @@
 # Changelog
 
-## [**Changes available only in 'Preview' NuGet packages:**](https://github.com/nanoframework/System.IO.Ports/tree/HEAD)
+## [v1.0.0-preview.54](https://github.com/nanoframework/System.IO.Ports/tree/v1.0.0-preview.54) (2021-07-16)
 
-[Full Changelog](https://github.com/nanoframework/System.IO.Ports/compare/v1.0.0-preview.52...HEAD)
+[Full Changelog](https://github.com/nanoframework/System.IO.Ports/compare/v1.0.0-preview.52...v1.0.0-preview.54)
 
 **Documentation and other chores:**