CI

fix: Unexpected default rack.session #256

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Run time

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Job	Run time
Ruby head	1m 14s
Ruby 3.3	2m 6s
Ruby 3.2	2m 5s
Ruby 3.1	1m 45s
Ruby 3.0	1m 40s
Ruby 2.7	1m 46s
Ruby 2.6	1m 52s
Ruby jruby-head	1m 23s
	13m 51s