docs(contributing): Fixes bad reference to angular

Fixes typo in contributing.

CONTRIBUTING.md

@@ -149,7 +149,7 @@ license your work under the the terms of the [MIT License](LICENSE.md).
 
 We have very precise rules over how our git commit messages can be formatted.  This leads to **more
 readable messages** that are easy to follow when looking through the **project history**.  But also,
-we use the git commit messages to **generate the AngularJS change log**.
+we use the git commit messages to **generate the UIGrid change log**.
 
 ### Commit Message Format
 Each commit message consists of a **header**, a **body** and a **footer**.  The header has a special