[PL] Collections - Typo in polish translation (#802)
[PL] Collections - Typo in polish translation (#802)

Word *kodyfikacja* was replaced with *modyfikacja*.
erickgnavar/elixir-school,doomspork/elixir-school,nscyclone/elixir-school,ElixirVietnam/elixir-school,doomspork/elixir_school,psantos10/elixir-school,doomspork/elixir-school,yuriibodarev/elixir-school,erickgnavar/elixir-school,nscyclone/elixir-school,yuriibodarev/elixir-school,yuriibodarev/elixir-school,ElixirVietnam/elixir-school,huydx/elixir-school,ElixirVietnam/elixir-school,huydx/elixir-school,doomspork/elixir_school,psantos10/elixir-school,doomspork/elixir_school,erickgnavar/elixir-school,psantos10/elixir-school,doomspork/elixir-school,nscyclone/elixir-school,huydx/elixir-school,nscyclone/elixir-school