Docs: linkify URLs in development-environment.md

docs/developer-guide/development-environment.md

@@ -4,13 +4,13 @@ ESLint has a very lightweight development environment that makes updating code f
 
 ## Step 1: Install Node.js
 
-Go to [http://nodejs.org/] to download and install the latest stable version for your operating system.
+Go to <http://nodejs.org/> to download and install the latest stable version for your operating system.
 
 Most of the installers come with [npm](http://npmjs.org/) already installed, but if for some reason it doesn't work on your system, you can install it manually using the instructions on the website.
 
 ## Step 2: Fork and checkout your own ESLint repository
 
-Go to [https://github.com/eslint/eslint] and click the "Fork" button. Follow the [GitHub documentation](https://help.github.com/articles/fork-a-repo) for forking and cloning.
+Go to <https://github.com/eslint/eslint> and click the "Fork" button. Follow the [GitHub documentation](https://help.github.com/articles/fork-a-repo) for forking and cloning.
 
 Once you've cloned the repository, run `npm install` to get all the necessary dependencies: