bundle update cool.io #1566

Job	Run time
benchmark-default (head)	11m 3s
benchmark-default (truffleruby)	15m 56s
test (truffleruby)	57s
benchmark-graph	49s
test (head)	59s
benchmark-ractor (head)	6m 50s
benchmark-run-once	1m 25s
benchmark-ractor-only (head)	36s
test (ruby)	1m 7s
benchmark-default (ruby)	11m 39s
all-tests	3s
	51m 24s

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