updated readme.md
fixed an issue introduced by 69e53a6d605701e8cf05a7b76f59ad908a099427

Not directly related to this PR, but I figure this is the place to do
it.

We may want to check through 69e53a6d605701e8cf05a7b76f59ad908a099427
to see if this happened anywhere else, @brandonmwest