[KO] Translation of Mnesia lesson (#422)
[KO] Translation of Mnesia lesson (#422)

* Translate Mnesia to Korean

* improve translation, thanks to @rijgndqw012

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