Update CONTRIBUTING.md language
Update CONTRIBUTING.md language

joshprice/elixir,lexmag/elixir,antipax/elixir,kelvinst/elixir,antipax/elixir,michalmuskala/elixir,elixir-lang/elixir,pedrosnk/elixir,beedub/elixir,kelvinst/elixir,gfvcastro/elixir,ggcampinho/elixir,kimshrier/elixir,pedrosnk/elixir,lexmag/elixir,beedub/elixir,ggcampinho/elixir,kimshrier/elixir,gfvcastro/elixir