Update gen-stage.md (#872)
Update gen-stage.md (#872)

* Update gen-stage.md

* Update the translation for the word 'sink'

doomspork/elixir_school,ElixirVietnam/elixir-school,psantos10/elixir-school,psantos10/elixir-school,erickgnavar/elixir-school,yuriibodarev/elixir-school,ElixirVietnam/elixir-school,nscyclone/elixir-school,yuriibodarev/elixir-school,doomspork/elixir_school,doomspork/elixir-school,nscyclone/elixir-school,huydx/elixir-school,doomspork/elixir-school,doomspork/elixir-school,erickgnavar/elixir-school,doomspork/elixir_school,psantos10/elixir-school,huydx/elixir-school,ElixirVietnam/elixir-school,nscyclone/elixir-school,yuriibodarev/elixir-school,erickgnavar/elixir-school,huydx/elixir-school,nscyclone/elixir-school