RSpec

Bump ruby/setup-ruby from 1.205.0 to 1.206.0 (#1236) #1605

Job	Run time
Ruby 3.2 and ActiveSupport 7.1	46s
Ruby 3.2 and ActiveSupport 7.2	44s
Ruby 3.2 and ActiveSupport 8.0	50s
Ruby 3.2 and ActiveSupport main	58s
Ruby 3.3 and ActiveSupport 7.1	51s
Ruby 3.3 and ActiveSupport 7.2	55s
Ruby 3.3 and ActiveSupport 8.0	52s
Ruby 3.3 and ActiveSupport main	1m 6s
Ruby head and ActiveSupport 7.1	1m 44s
Ruby head and ActiveSupport 7.2	1m 43s
Ruby head and ActiveSupport 8.0	1m 36s
Ruby head and ActiveSupport main	1m 39s
	13m 44s

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