Fix type spec for Task.Supervisor.start_child/4 (#7744)
Fix type spec for Task.Supervisor.start_child/4 (#7744)


kimshrier/elixir,kelvinst/elixir,joshprice/elixir,kelvinst/elixir,pedrosnk/elixir,ggcampinho/elixir,michalmuskala/elixir,pedrosnk/elixir,elixir-lang/elixir,lexmag/elixir,ggcampinho/elixir,lexmag/elixir,kimshrier/elixir