Update CHANGELOG for v1.0.2.3

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -1,8 +1,8 @@
 # Changelog
 
-## [**Changes available only in 'Preview' NuGet packages:**](https://github.com/nanoframework/System.Device.I2c/tree/HEAD)
+## [v1.0.2-preview.8](https://github.com/nanoframework/System.Device.I2c/tree/v1.0.2-preview.8) (2021-12-02)
 
-[Full Changelog](https://github.com/nanoframework/System.Device.I2c/compare/v1.0.2-preview.6...HEAD)
+[Full Changelog](https://github.com/nanoframework/System.Device.I2c/compare/v1.0.2-preview.6...v1.0.2-preview.8)
 
 **Documentation and other chores:**