fix process exited before calling "close" method on dispose.

Author: taooceros

Flow.Launcher.Core/Plugin/ProcessStreamPluginV2.cs

@@ -82,10 +82,10 @@ public override async Task ReloadDataAsync()
 
         public override async ValueTask DisposeAsync()
         {
+            await base.DisposeAsync();
             ClientProcess.Kill(true);
             await ClientProcess.WaitForExitAsync();
             ClientProcess.Dispose();
-            await base.DisposeAsync();
         }
     }
 }