Add Jorel in the plugin list

doc/src/guide/external_plugins_list.asciidoc

@@ -31,6 +31,11 @@ as an Erlang.mk plugin.
 An https://github.com/inaka/hexer.mk[Hex plugin] for Erlang.mk.
 Hex is a https://hex.pm/[package manager for the Elixir ecosystem].
 
+=== jorel
+
+https://github.com/emedia-project/jorel[Jorel] is Just anOther RELease 
+assembler for Erlang/OTP, and is available as an Erlang.mk plugin.
+
 === lfe.mk
 
 An https://github.com/ninenines/lfe.mk[LFE plugin] for Erlang.mk.