update src/WPF/GeneralUpdate.Packet/ViewModels/PacketViewModel.cs.

path变量path = Path.Combine时没有添加文件后缀（.zip），导致File.Exists(path)始终为false

Signed-off-by: yzy945 <[email protected]>

Author: yzy945

src/WPF/GeneralUpdate.Packet/ViewModels/PacketViewModel.cs

@@ -365,7 +365,7 @@ private async Task CreateZip()
             .CreateOperate(OperationType.GZip, packetName, sourcePath, targetPath)
             .CreateZip();
 
-            var path = Path.Combine(targetPath, packetName);
+            var path = Path.Combine(targetPath, $"{PacketName}{CurrentFormat}");
             await ShowMessage("Compression operation", File.Exists(path) ? $"{path} Created successfully." : $"{path} Creation failure!");
         }