help zulip recognize images

modules/irc/src/main/IrcApi.scala

@@ -105,7 +105,8 @@ final class IrcApi(
       imageUrl: String
   ): Funit =
     zulip(_.image, "blog")(
-      s"![$filename]($imageUrl) [$title](/@/${user.username}/blog/$slug/$id) by ${markdown.userLink(user)}"
+      s"[$filename](${imageUrl.replace("/display?", "/display.jpg?")}) [$title](/@/${user.username}/blog/$slug/$id) by ${markdown
+        .userLink(user)}"
     )
 
   def userAppeal(user: User, mod: Holder): Funit =