fix: wpf warnings

src/MaaWpfGui/Helper/WebService.cs

@@ -1,3 +1,16 @@
+// <copyright file="WebService.cs" company="MaaAssistantArknights">
+// MaaWpfGui - A part of the MaaCoreArknights project
+// Copyright (C) 2021 MistEO and Contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY
+// </copyright>
+
 using System;
 using System.Collections.Generic;
 using System.IO;

src/MaaWpfGui/Main/AsstProxy.cs

@@ -1664,4 +1664,4 @@ namespace MaaWpfGui
         /// </summary>
         DeploymentWithPause = 3,
     }
-}
+}

src/MaaWpfGui/Main/VersionUpdateViewModel.cs

@@ -971,4 +971,4 @@ namespace MaaWpfGui
             Process.Start(e.Parameter.ToString());
         }
     }
-}
+}