update changelog

Author: noodlefighter

CHANGELOG.md

@@ -1,11 +1,8 @@
 # Changelog
 
-## [Unreleased]
-### Added
-### Changed
+## [1.6.1] - 2021-09-17
 ### Fixed
-### Removed
-
+- 修复涂白功能在高DPI图片下可能将对话框的边缘覆盖的问题
 
 ## [1.6.0] - 2021-03-14
 ### Added

do_release.sh

@@ -14,6 +14,7 @@ program_exists() {
 
 show_usage() {
     echo "Usage: $0 <version>"
+    echo "  version:\tlike 1.6.0"
     exit 1
 }