AO3-6815 Update Contributing Information #4536

Job	Run time
rake db:otwseed	1m 4s
rspec spec/controllers	11m 1s
rspec spec/models	5m 25s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	7m 58s
cucumber features/admins	5m 55s
cucumber features/bookmarks	4m 51s
cucumber features/collections	6m 21s
cucumber features/comments_and_kudos	6m 26s
cucumber features/gift_exchanges	6m 23s
cucumber features/importing	2m 40s
cucumber features/other_a	10m 1s
cucumber features/other_b	6m 11s
cucumber features/prompt_memes_a	4m 18s
cucumber features/prompt_memes_b	3m 44s
cucumber features/prompt_memes_c	5m 3s
cucumber features/search	6m 30s
cucumber features/tag_sets	3m 5s
cucumber features/tags_and_wrangling	6m 12s
cucumber features/users	5m 11s
cucumber features/works	12m 39s
	2h 0m 58s

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