Correct some comments

Author: Suiram1701

API.Test/TeachingTests.cs

@@ -95,7 +95,7 @@ public void GetNewsFeed()
     {
         Client.LoginAsync(s_Server, s_LoginName, s_UserName, s_Password).Wait();
 
-        Task<News> news = Client.GetNewsFeedAsync(new DateTime(2023, 06, 23));
+        Task<News> news = Client.GetNewsFeedAsync(new DateTime(2023, 07, 10));
         news.Wait();
         if (news.Result != null)
             Assert.Pass();

WebUntisAPI.Client/Models/Messages/Draft.cs

@@ -71,7 +71,7 @@ public class Draft
         public List<MessagePerson> Recipients { get; set; } = null;
 
         /// <summary>
-        /// The full content of the draft
+        /// The full content of the draft (\n is used for line breaks)
         /// </summary>
         [JsonProperty("content")]
         public string Content { get; set; }

WebUntisAPI.Client/Models/Messages/Message.cs

@@ -81,7 +81,7 @@ private MessagePerson Recipient
         }
 
         /// <summary>
-        /// The full content of the message
+        /// The full content of the message (\n is used for line breaks)
         /// </summary>
         [JsonProperty("content")]
         public string Content { get; set; } = string.Empty;

WebUntisAPI.Client/Models/NewsMessage.cs

@@ -20,7 +20,7 @@ public class NewsMessage
         public string Subject { get; set; }
 
         /// <summary>
-        /// The normal text of the news (<![CDATA[<br>]]> is used for line breaks)
+        /// The normal text of the news (<![CDATA[<br>]]> or \n is used for line breaks)
         /// </summary>
         [JsonProperty("text")]
         public string Text { get; set; }