simplify fileTypes expression

Author: msftrncs

ConvertTo-PList.ps1

@@ -145,7 +145,7 @@ foreach ($file in $Path) {
     # write the PList document from a custom made object, supplying some data missing from the JSON file, ignoring some JSON objects
     # and reordering the items that remain.
     ConvertTo-Plist ([ordered]@{
-            fileTypes                                            = ([string[]]$('ps1', 'psm1', 'psd1'))
+            fileTypes                                            = @('ps1', 'psm1', 'psd1')
             $grammer_json.psobject.Properties['name'].Name       = $grammer_json.psobject.Properties['name'].Value
             $grammer_json.psobject.Properties['patterns'].Name   = $grammer_json.psobject.Properties['patterns'].Value
             $grammer_json.psobject.Properties['repository'].Name = $grammer_json.psobject.Properties['repository'].Value