update commands (#986)

Author: ethanpalm

README.md

@@ -1,13 +1,13 @@
 # Mintlify Documentation
 
-Install the [Mintlify CLI](https://www.npmjs.com/package/mintlify) to preview the documentation changes locally. To install, use the following command
+Install the [Mint CLI](https://www.npmjs.com/package/mint) to preview the documentation changes locally. To install, use the following command
 
 ```
-npm i -g mintlify
+npm i -g mint
 ```
 
-Run the following command at the root of your documentation (where mint.json is)
+Run the following command at the root of your documentation (where docs.json is)
 
 ```
-mintlify dev
+mint dev
 ```