bump version from 0.4.3 to 0.4.4

Signed-off-by: Tiger Wang <tigerwang@outlook.com>

common/constants.go

@@ -2,6 +2,6 @@ package common
 
 const (
 	SERVICENAME = "casaos"
-	VERSION     = "0.4.3"
+	VERSION     = "0.4.4"
 	BODY        = " "
 )