Fixed 3 typos in README
Fixed 3 typos in README

I honestly question whether these are typos considering the same mistake was made 3 times.
Aloomaio/netlify-cms,netlify/netlify-cms,Aloomaio/netlify-cms,netlify/netlify-cms,dopry/netlify-cms,netlify/netlify-cms,dopry/netlify-cms,netlify/netlify-cms