Add more inline links to BUILD.md

Author: ryangoree

BUILD.md

@@ -42,10 +42,11 @@ npm install --global yarn
 ### Working in a Monorepo
 
 In a [Yarn Workspaces](https://classic.yarnpkg.com/en/docs/workspaces) monorepo,
-the root `package.json` file contains a list of workspaces, each of which is
-it's own package with it's own `package.json` file.
+the root [`package.json`](./package.json) file contains a list of workspaces,
+each of which is it's own package with it's own `package.json` file.
 
-You can work with the root `package.json` mostly like you would with any other:
+You can work with the root [`package.json`](./package.json) mostly like you
+would with any other:
 
 ```sh
 yarn <script-name>