Test

Migrate README to markdown #1810

Job	Run time
ruby-versions / Generate Ruby versions	5s
test (3.0, macos-latest)	48s
test (3.1, windows-latest)	2m 19s
test (3.0, ubuntu-latest)	34s
test (3.3, ubuntu-latest)	37s
test (3.0, windows-latest)	2m 14s
test (3.4, ubuntu-latest)	35s
test (3.1, ubuntu-latest)	34s
test (3.2, windows-latest)	2m 13s
test (3.4, windows-latest)	2m 13s
test (3.1, macos-latest)	35s
test (head, ubuntu-latest)	45s
test (3.2, macos-latest)	41s
test (3.3, macos-latest)	39s
test (3.4, macos-latest)	39s
test (3.3, windows-latest)	2m 6s
test (jruby-head, macos-latest)	2m 40s
test (mswin, windows-latest)	2m 8s
test (jruby-head, ubuntu-latest)	3m 34s
test (head, macos-latest)	50s
test (head, windows-latest)	2m 19s
test (3.2, ubuntu-latest)	40s
test (jruby, macos-latest)	2m 31s
test (truffleruby, ubuntu-latest)	3m 30s
test (truffleruby-head, ubuntu-latest)	3m 22s
test (truffleruby-head, macos-latest)	2m 48s
test (truffleruby, macos-latest)	2m 43s
test (jruby, ubuntu-latest)	3m 19s
	48m 1s

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