update missing xmldocs

src/Discord.Net.WebSocket/Entities/Channels/ISocketMessageChannel.cs

@@ -38,7 +38,7 @@ namespace Discord.WebSocket
         ///     Sends a file to this message channel with an optional caption.
         /// </summary>
         /// <remarks>
-        ///     This method follows the same behavior as described in <see cref="IMessageChannel.SendFileAsync(string, string, bool, Embed, RequestOptions)"/>.
+        ///     This method follows the same behavior as described in <see cref="IMessageChannel.SendFileAsync(string, string, bool, Embed, RequestOptions, bool)"/>.
         ///     Please visit its documentation for more details on this method.
         /// </remarks>
         /// <param name="filePath">The file path of the file.</param>
@@ -46,6 +46,7 @@ namespace Discord.WebSocket
         /// <param name="isTTS">Whether the message should be read aloud by Discord or not.</param>
         /// <param name="embed">The <see cref="Discord.EmbedType.Rich" /> <see cref="Embed" /> to be sent.</param>
         /// <param name="options">The options to be used when sending the request.</param>
+        /// <param name="isSpoiler">Whether the message attachment should be hidden as a spoiler.</param>
         /// <returns>
         ///     A task that represents an asynchronous send operation for delivering the message. The task result
         ///     contains the sent message.
@@ -64,6 +65,7 @@ namespace Discord.WebSocket
         /// <param name="isTTS">Whether the message should be read aloud by Discord or not.</param>
         /// <param name="embed">The <see cref="Discord.EmbedType.Rich"/> <see cref="Embed"/> to be sent.</param>
         /// <param name="options">The options to be used when sending the request.</param>
+        /// <param name="isSpoiler">Whether the message attachment should be hidden as a spoiler.</param>
         /// <returns>
         ///     A task that represents an asynchronous send operation for delivering the message. The task result
         ///     contains the sent message.