Fix misleading doc string (#8355)
Fix misleading doc string (#8355)

naive_datetime_to_iso_days takes a datetime without time zone
lexmag/elixir,kelvinst/elixir,pedrosnk/elixir,michalmuskala/elixir,pedrosnk/elixir,kimshrier/elixir,elixir-lang/elixir,kelvinst/elixir,ggcampinho/elixir,joshprice/elixir,ggcampinho/elixir,kimshrier/elixir,lexmag/elixir