Update CHANGELOG for v1.2.1

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -2,7 +2,16 @@
 
 ## [**Changes available only in 'Preview' NuGet packages:**](https://github.com/nanoframework/lib-nanoFramework.Devices.Can/tree/HEAD)
 
-[Full Changelog](https://github.com/nanoframework/lib-nanoFramework.Devices.Can/compare/v1.2.1-preview.15...HEAD)
+[Full Changelog](https://github.com/nanoframework/lib-nanoFramework.Devices.Can/compare/v1.2.1-preview.17...HEAD)
+
+**Documentation and other chores:**
+
+- Update 2 NuGet dependencies [\#72](https://github.com/nanoframework/lib-nanoFramework.Devices.Can/pull/72)
+- Update 2 NuGet dependencies [\#71](https://github.com/nanoframework/lib-nanoFramework.Devices.Can/pull/71)
+
+## [v1.2.1-preview.17](https://github.com/nanoframework/lib-nanoFramework.Devices.Can/tree/v1.2.1-preview.17) (2020-10-20)
+
+[Full Changelog](https://github.com/nanoframework/lib-nanoFramework.Devices.Can/compare/v1.2.1-preview.15...v1.2.1-preview.17)
 
 **Documentation and other chores:**