Update v0.2.1 changelog

Author: rth

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.2.1] - 2022-12-18
+## [0.2.1] - 2022-12-20
 ### Added
  - Define `pyodide_cli.app.typer_click_object` when `pyodide_cli` is imported from within sphinx,
    to allow auto-generate CLI documentation with [sphinx-click](https://sphinx-click.readthedocs.io/en/latest/)