Add Brian Williams as a maintainer
See gitlab-com/www-gitlab-com#12613 (closed) for the trainee maintainer issue and gitlab-com/www-gitlab-com!96980 (merged) for the team member entry update.
Edited by Brian Williams
See gitlab-com/www-gitlab-com#12613 (closed) for the trainee maintainer issue and gitlab-com/www-gitlab-com!96980 (merged) for the team member entry update.