chore: Bump version to 2.2.1

Signed-off-by: MSDNicrosoft <wang3311835119@hotmail.com>

Author: MSDNicrosoft

gradle.properties

@@ -6,7 +6,7 @@ mod_id=mgbuttons
 mod_license=LGPLv3
 mod_name=Command GUI Buttons
 mod_sources=https://github.com/MSDNicrosoft/Command-GUI-Buttons
-mod_version=2.2.0
+mod_version=2.2.1
 maven_group=work.msdnicrosoft.commandbuttons
 archives_base_name=CommandGUIButtons