Add favicon to jsonfeed

Controllers/JsonFeed.cs

@@ -28,8 +28,7 @@ public class JsonFeed : Controller {
 		[J("description")]   public string Description => "Blog of a disabled neurodivergent queer person unhappy with the state of the world";
 		[J("home_page_url")] public string HomeUrl     => "https://zotan.pw/blog";
 		[J("feed_url")]      public string FeedUrl     => "https://zotan.pw/blog/feed.json";
-
-		// TODO: favicon/icon
+		[J("favicon")]       public string Favicon     => "https://zotan.pw/favicon.ico";
 
 		[J("items")] public List<JsonFeedItem> Items { get; init; } = new();
 	}