[tests] fix site_generators_tests.TestUserList.test_users()

Brion VIBBER was renamed to Brooke Vibber:
https://www.mediawiki.org/w/index.php?title=User:Brion_VIBBER&action=history

Change-Id: Ia76073ad56e7f867a899af4a59b74e1fd8b8cfef
---
M tests/site_generators_tests.py
1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/tests/site_generators_tests.py b/tests/site_generators_tests.py
index 4109cbc..0ef1683 100755
--- a/tests/site_generators_tests.py
+++ b/tests/site_generators_tests.py
@@ -1522,7 +1522,7 @@
 
     def test_users(self):
         """Test the site.users() method with preset usernames."""
-        user_list = ['Jimbo Wales', 'Brion VIBBER', 'Tim Starling']
+        user_list = ['Jimbo Wales', 'Brooke Vibber', 'Tim Starling']
         missing = ['A username that should not exist 1A53F6E375B5']
         all_users = user_list + missing
         for cnt, user in enumerate(self.site.users(all_users), start=1):

