Update CLA info

Author: Eilon

CONTRIBUTING.md

@@ -45,7 +45,7 @@ GitHub supports [markdown](http://github.github.com/github-flavored-markdown/),
 
 
 ## Contributing code and content
-You will need to sign a [Contributor License Agreement](https://cla.msopentech.com) before submitting your pull request. To complete the Contributor License Agreement (CLA), you will need to submit a request via the form and then electronically sign the Contributor License Agreement when you receive the email containing the link to the document. This needs to only be done once for any Microsoft Open Technologies OSS project.
+You will need to sign a [Contributor License Agreement](https://cla2.dotnetfoundation.org/) before submitting your pull request. To complete the Contributor License Agreement (CLA), you will need to submit a request via the form and then electronically sign the Contributor License Agreement when you receive the email containing the link to the document. This needs to only be done once for any .NET Foundation OSS project.
 
 Make sure you can build the code. Familiarize yourself with the project workflow and our coding conventions. If you don't know what a pull request is read this article: https://help.github.com/articles/using-pull-requests.