Make lint happy

lib/pleroma/web/plugs/http_security_plug.ex

@@ -100,6 +100,7 @@ defp csp_string do
       if Config.get([:media_proxy, :enabled]) &&
            !Config.get([:media_proxy, :proxy_opts, :redirect_on_failure]) do
         sources = build_csp_multimedia_source_list()
+
         {
           [img_src, sources],
           [media_src, sources],
@@ -113,7 +114,6 @@ defp csp_string do
         }
       end
 
-
     connect_src =
       if Config.get(:env) == :dev do
         [connect_src, " http://localhost:3035/"]