New translations en.xaml (Dutch)

[ci skip]

Author: jjw24

Plugins/Flow.Launcher.Plugin.Shell/Languages/nl.xaml

@@ -15,4 +15,6 @@
     <system:String x:Key="flowlauncher_plugin_cmd_run_as_administrator">Run As Administrator</system:String>
     <system:String x:Key="flowlauncher_plugin_cmd_copy">Copy the command</system:String>
     <system:String x:Key="flowlauncher_plugin_cmd_history">Only show number of most used commands:</system:String>
+    <system:String x:Key="flowlauncher_plugin_cmd_command_not_found">Command not found: {0}</system:String>
+    <system:String x:Key="flowlauncher_plugin_cmd_error_running_command">Error running the command: {0}</system:String>
 </ResourceDictionary>