Add link to elixir-multihashing implementation

Author: candeira

README.md

@@ -57,7 +57,7 @@ Because aesthetically I prefer the code first. You already have to write your st
 - [rust-multihash](//github.com/google/rust-multihash)
 - [haskell-multihash](//github.com/LukeHoersten/multihash)
 - [python-multihash](//github.com/tehmaze/python-multihash)
-- [elixir-multihash](//github.com/zabirauf/ex_multihash)
+- [elixir-multihash](//github.com/zabirauf/ex_multihash), [elixir-multihashing](//github.com/candeira/ex_multihashing)
 - [swift-multihash](//github.com/NeoTeo/SwiftMultihash)
 - [ruby-multihash](//github.com/neocities/ruby-multihash)