Update OnStartAzureVirtualMachineFileServer.ps1 (#357)

I used the Github editor to replace the file content and looks like there are some special chars got in which are not even visible in change log  I’ll send out another PR.

                Expand-ZIPFile –File $zipFile –Destination "$pwd"                
                Move-Item -Path $zipFile -Destination "$zipFile.expanded" -Force

appservice-fileserver-standalone/scripts/OnStartAzureVirtualMachineFileServer.ps1

@@ -100,7 +100,7 @@ try
 
             if (Test-Path $zipFile) 
             {
-                Expand-ZIPFile –File $zipFile –Destination "$pwd"                
+                Expand-ZIPFile -file $zipFile -destination "$pwd"           
                 Move-Item -Path $zipFile -Destination "$zipFile.expanded" -Force
             }
         }