Fix formatting in docs for access.ex (#8003)
Fix formatting in docs for access.ex (#8003)

The code block was rendering as regular text because it needs one more
space to be considered code.
ggcampinho/elixir,lexmag/elixir,kelvinst/elixir,pedrosnk/elixir,kelvinst/elixir,ggcampinho/elixir,lexmag/elixir,pedrosnk/elixir,michalmuskala/elixir,joshprice/elixir,kimshrier/elixir,kimshrier/elixir,elixir-lang/elixir