Contrib docs: add section stub about pull requests.

laravel/documentation/contrib/github.md

@@ -5,20 +5,21 @@ ## Contents
 - [The Basics](#the-basics)
 - [Repositories](#repositories)
 - [Branches](#branches)
+- [Pull Requests](#pull-requests)
 
-<a name='the-basics'></a>
+<a name="the-basics"></a>
 ## The Basics
 
 Because Laravel's development and source control is done through GitHub, anyone is able to make contributions to it. Anyone can fix bugs, add features or improve the documentation.
 
 After submitting proposed changes to the project, the Laravel team will review the changes and make the decision to commit them to Laravel's core.
 
-<a name='repositories'></a>
+<a name="repositories"></a>
 ## Repositories
 
 Laravel's home on GitHub is at [github.com/laravel](https://github.com/laravel). Laravel has several repositories. For basic contributions, the only repository you need to pay attention to is the **laravel** repository, located at [github.com/laravel/laravel](https://github.com/laravel/laravel).
 
-<a name='branches'></a>
+<a name="branches"></a>
 ## Branches
 
 The **laravel** repository has multiple branches, each serving a specific purpose:
@@ -28,6 +29,11 @@ ## Branches
 
 Once certain milestones have been reached and/or Taylor Otwell and the Laravel team is happy with the stability and additional features of the current development branch, the changes in the **develop** branch are pulled into the **master** branch, thus creating and releasing the newest stable version of Laravel for the world to use.
 
+<a name="pull-requests"></a>
+## Pull Requests
+
+Contributing with pull requests.
+
 *Further Reading*
 
  - [Contributing to Laravel via Command-Line](docs/contrib/command-line)