Fix optional param being non-optional (#2869)

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

@@ -1,18 +1,17 @@
 using System.Threading.Tasks;
 
-namespace Discord
+namespace Discord;
+
+/// <summary>
+///     Represents a generic news channel in a guild that can send and receive messages.
+/// </summary>
+public interface INewsChannel : ITextChannel
 {
     /// <summary>
-    ///     Represents a generic news channel in a guild that can send and receive messages.
+    ///     Follow this channel to send messages to a target channel.
     /// </summary>
-    public interface INewsChannel : ITextChannel
-    {
-        /// <summary>
-        ///     Follow this channel to send messages to a target channel.
-        /// </summary>
-        /// <returns>
-        ///     The Id of the created webhook.
-        /// </returns>
-        Task<ulong> FollowAnnouncementChannelAsync(ulong channelId, RequestOptions options);
-    }
+    /// <returns>
+    ///     The Id of the created webhook.
+    /// </returns>
+    Task<ulong> FollowAnnouncementChannelAsync(ulong channelId, RequestOptions options = null);
 }