New translations en.xaml (Vietnamese)

[ci skip]

Author: jjw24

Flow.Launcher/Languages/vi.xaml

@@ -401,6 +401,7 @@
     <system:String x:Key="newActionKeywordsSameAsOld">This new Action Keyword is the same as old, please choose a different one</system:String>
     <system:String x:Key="success">Thành công</system:String>
     <system:String x:Key="completedSuccessfully">Đã hoàn tất thành công</system:String>
+    <system:String x:Key="failedToCopy">Failed to copy</system:String>
     <system:String x:Key="actionkeyword_tips">Enter the action keywords you like to use to start the plugin and use whitespace to divide them. Use * if you don't want to specify any, and the plugin will be triggered without any action keywords.</system:String>
 
     <!--  Search Delay Settings Dialog  -->