Improves module documentation of DynamicSupervisor (#9080)
Improves module documentation of DynamicSupervisor (#9080)

Fixes #9075
ggcampinho/elixir,kimshrier/elixir,lexmag/elixir,elixir-lang/elixir,kelvinst/elixir,pedrosnk/elixir,kimshrier/elixir,lexmag/elixir,joshprice/elixir,ggcampinho/elixir,kelvinst/elixir,pedrosnk/elixir,michalmuskala/elixir