chore: update set up the docs repo step

Author: HuiSF

Readme.md

@@ -13,8 +13,9 @@
 
 1. [Fork this repo](/fork) and `git clone` it.
 2. In your terminal, navigate to the repo from where it was just cloned. This should be located at the `/docs` directory.
-3. From your command line, run `yarn && yarn dev`.
-4. <http://localhost:3000/> should open automatically.
+3. Set yarn version to the modern latest version, run `corepack enable && yarn set version berry`.
+4. From your command line, run `yarn && yarn dev`.
+5. <http://localhost:3000/> should open automatically.
 
 ## How to contribute