AO3-6882 Allow newer Ruby version to unblock upgrade #4989

Job	Run time
rake db:otwseed	1m 6s
rspec spec/controllers	13m 15s
rspec spec/models	5m 59s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	8m 51s
cucumber features/admins	7m 5s
cucumber features/bookmarks	5m 8s
cucumber features/collections	6m 54s
cucumber features/comments_and_kudos	7m 33s
cucumber features/gift_exchanges	7m 40s
cucumber features/importing	3m 18s
cucumber features/other_a	11m 47s
cucumber features/other_b	6m 49s
cucumber features/prompt_memes_a	4m 33s
cucumber features/prompt_memes_b	4m 20s
cucumber features/prompt_memes_c	5m 29s
cucumber features/search	7m 7s
cucumber features/tag_sets	3m 59s
cucumber features/tags_and_wrangling	7m 7s
cucumber features/users	5m 43s
cucumber features/works	12m 52s
	2h 16m 35s

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