AO3-6815 Update Contributing Information #4537

Job	Run time
rake db:otwseed	1m 43s
rspec spec/controllers	11m 18s
rspec spec/models	6m 11s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	7m 12s
cucumber features/admins	6m 10s
cucumber features/bookmarks	4m 48s
cucumber features/collections	5m 49s
cucumber features/comments_and_kudos	6m 30s
cucumber features/gift_exchanges	6m 47s
cucumber features/importing	2m 29s
cucumber features/other_a	10m 1s
cucumber features/other_b	6m 43s
cucumber features/prompt_memes_a	3m 49s
cucumber features/prompt_memes_b	3m 40s
cucumber features/prompt_memes_c	4m 52s
cucumber features/search	7m 8s
cucumber features/tag_sets	4m 54s
cucumber features/tags_and_wrangling	6m 27s
cucumber features/users	5m 1s
cucumber features/works	15m 39s
	2h 7m 11s

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