update changelog with fix for #1305 (#1386)

Author: mikeebowen

CHANGELOG.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Fixed
 - Fixed incorrect file extensions for vbaProject files (#1292)
+- Fixed incorrect file extensions for ImagePart (#1305)
 - Fixed incorrect casing for customXml (#1351)
 
 ## [2.19.0] - 2022-12-14