[ci skip] Update CHANGELOG.md

Author: yhatt

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+### Changed
+
+- Upgrade to [Marpit v2.0.1](https://github.com/marp-team/marpit/releases/tag/v2.0.1) and [Marp Core v2.0.1](https://github.com/marp-team/marp-core/releases/tag/v2.0.1) ([#342](https://github.com/marp-team/marp-cli/pull/342))
+- Upgrade dependent packages to the latest version ([#342](https://github.com/marp-team/marp-cli/pull/342))
+
 ## v1.0.0 - 2021-04-24
 
 ### Breaking