update the changelog for v2.2.2

bhazelton · bhazelton · commit f7e61331f1aa · 2021-09-30T12:07:19.000-07:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -4,6 +4,7 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [2.2.2] - 2021-9-30
 
 ### Added
 - Added the `UVData.write_ms` method, a UVData measurement set writer.
