Updates deployment in readme from netlify to vercel (#4225)

* updates readme

* removed hosting provider name

README.md

@@ -53,7 +53,7 @@ The documentation is divided into several sections with a different tone and pur
 1. `git push my-fork-name the-name-of-my-branch`
 1. Go to the [reactjs.org repo](https://github.com/reactjs/reactjs.org) and you should see recently pushed branches.
 1. Follow GitHub's instructions.
-1. If possible, include screenshots of visual changes. A [Netlify](https://www.netlify.com/) build will also be automatically created once you make your PR so other people can see your change.
+1. If possible, include screenshots of visual changes. A preview build is triggered after your changes are pushed to GitHub.
 
 ## Translation
 

beta/README.md

@@ -56,7 +56,7 @@ The documentation is divided into several sections with a different tone and pur
 1. `git push my-fork-name the-name-of-my-branch`
 1. Go to the [reactjs.org repo](https://github.com/reactjs/reactjs.org) and you should see recently pushed branches.
 1. Follow GitHub's instructions.
-1. If possible, include screenshots of visual changes. A [Netlify](https://www.netlify.com/) build will also be automatically created once you make your PR so other people can see your change.
+1. If possible, include screenshots of visual changes. A preview build is triggered after your changes are pushed to GitHub.
 
 ## Translation