Update CHANGELOG for v1.0.0

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## [v1.0.0-preview.1](https://github.com/nanoframework/System.Device.Adc/tree/v1.0.0-preview.1) (2021-10-27)
+
+[Full Changelog](https://github.com/nanoframework/System.Device.Adc/compare/34663284862256c27f328eca4deebb8b17c9bb9f...v1.0.0-preview.1)
+
 
 
 \* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/github-changelog-generator/github-changelog-generator)*