docs: update npm-link docs URL

Author: Splaktar

README.md

@@ -169,7 +169,7 @@ The folder you cloned it into, npm's folder where it stores global packages and
 
 You can also use `ng new foo --link-cli` to automatically link the `@angular/cli` package.
 
-Please read the official [npm-link documentation](https://www.npmjs.org/doc/cli/npm-link.html)
+Please read the official [npm-link documentation](https://docs.npmjs.com/cli/link)
 and the [npm-link cheatsheet](http://browsenpm.org/help#linkinganynpmpackagelocally) for more information.
 
 To run the Angular CLI test suite use the `node tests/run_e2e.js` command.