Pleroma.Web.MastodonAPI.StatusView: Do not fail when URL isn’t a string

lib/pleroma/web/mastodon_api/views/status_view.ex

@@ -240,7 +240,7 @@ def render_content(%{"type" => "Article"} = object) do
     summary = object["name"]
 
     content =
-      if !!summary and summary != "" do
+      if !!summary and summary != "" and is_bitstring(object["url"]) do
         "<p><a href=\"#{object["url"]}\">#{summary}</a></p>#{object["content"]}"
       else
         object["content"]