[PL] Updated translation for: Concurrency (#2573)
[PL] Updated translation for: Concurrency (#2573)

* [PL] Updated translation for: Concurrency

* chore: Code review improvements
doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir-school