Add authorized_fetch_mode to description.exs

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

config/description.exs

@@ -1729,6 +1729,11 @@ config :pleroma, :config_description, [
         type: :boolean,
         description: "Sign object fetches with HTTP signatures"
       },
+      %{
+        key: :authorized_fetch_mode,
+        type: :boolean,
+        description: "Require HTTP signatures for AP fetches"
+      },
       %{
         key: :note_replies_output_limit,
         type: :integer,