Add note about yarn berry in installation docs

Author: fhammerschmidt

pages/docs/manual/latest/installation.mdx

@@ -15,7 +15,7 @@ With the instructions below, our new standard library [ReScript Core](https://gi
 - [Node.js](https://nodejs.org/) version >= 14
 - One of the following package managers:
   - [npm](https://docs.npmjs.com/cli/) (comes with Node.js)
-  - [yarn](https://yarnpkg.com/)
+  - [yarn](https://yarnpkg.com/) (yarn versions >1 need to set `nodeLinker: node-modules` in `.yarnrc.yml`)
   - [pnpm](https://pnpm.io/)
   - [bun](https://bun.sh/)