[GR] Bump GenStage to latest version (#2469)
[GR] Bump GenStage to latest version (#2469)

* [GR] Bump GenStage to latest version

* Update gen-stage.md

* Update gen-stage.md

* Update gen-stage.md
doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir_school,doomspork/elixir-school