Update summary message on IAudioChannel.DisconnectAsync()

src/Discord.Net.Core/Entities/Channels/IAudioChannel.cs

@@ -12,7 +12,7 @@ namespace Discord
         /// <summary> Connects to this audio channel but can specify if client is handled externally. </summary>
         Task<IAudioClient> ConnectAsync(Action<IAudioClient> configAction = null, bool external = false);
 
-        /// <summary> Disconnects from this audio channel if applicable. </summary>
+        /// <summary> Disconnects from this audio channel. </summary>
         Task DisconnectAsync();
     }
 }