Modify misc/README.md.erb and regenerate README #383

Job	Run time
ruby-versions / Generate Ruby versions	3s
test (3.0)	47s
test (3.1)	48s
test (3.2)	59s
test (3.3)	1m 0s
test (debug)	1m 11s
test (head)	50s
	5m 38s

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