[PT] Update lesson Specifics/Nerves -> 1.1.2 (#2601)
[PT] Update lesson Specifics/Nerves -> 1.1.2 (#2601)

Closes #2600
doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir-school