Minor tweaks to Agent docs (#8110)
Minor tweaks to Agent docs (#8110)

[ci skip]
elixir-lang/elixir,joshprice/elixir,kelvinst/elixir,lexmag/elixir,kelvinst/elixir,kimshrier/elixir,lexmag/elixir,pedrosnk/elixir,ggcampinho/elixir,pedrosnk/elixir,ggcampinho/elixir,michalmuskala/elixir,kimshrier/elixir