updates canonical name of John Pignata
updates canonical name of John Pignata

gitlabhq/gitlab-contributors,maclover7/rails-contributors,amitsuroliya/rails-contributors,fxn/rails-contributors,gitlabhq/gitlab-contributors,gitlabhq/gitlab-contributors,amitsuroliya/rails-contributors,maclover7/rails-contributors,fxn/rails-contributors,fxn/rails-contributors,fxn/rails-contributors,gitlabhq/gitlab-contributors,maclover7/rails-contributors,amitsuroliya/rails-contributors,amitsuroliya/rails-contributors,maclover7/rails-contributors