Bug 776954 - Update mozmill repo URL to reflect github.com/mozautomation/* -> mozilla/ move; r=trivial

testing/peptest/peptest/extension/resource/mozmill/README.md

@@ -2,7 +2,8 @@
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
-These folders are pulled from https://github.com/mozautomation/mozmill/tree/master/mozmill/mozmill/extension/resource.
+These folders are pulled from:
+https://github.com/mozilla/mozmill/tree/master/mozmill/mozmill/extension/resource
 
 To update them, simply checkout the mozmill repo at https://github.com/mozautomation/mozmill, 
 then copy and paste the 'driver' and 'stdlib' folders to this location.