add rule for ႂ် sound

dictsource/shn_rules

@@ -283,10 +283,13 @@
 
 
 .group   ွ   
-              ွ        O
+          ွ        O
 
-.group   ႂ
-              ႂ်       aWi
+.group   ႂ   
+          ႂ           O
+
+.group  ႂ်
+         ႂ်       aWi
 
 .group  ြ
             ြ          ra