Merge pull request #69 from ruby/use-macos-14 #1192

Job	Run time
ruby-versions / Generate Ruby versions	7s
ubuntu-22.04 2.7	44s
ubuntu-22.04 3.0	21s
ubuntu-22.04 3.1	22s
ubuntu-22.04 3.2	22s
ubuntu-22.04 3.3	18s
ubuntu-22.04 head	18s
ubuntu-20.04 2.7	45s
ubuntu-20.04 3.0	21s
ubuntu-20.04 3.1	26s
ubuntu-20.04 3.2	25s
ubuntu-20.04 3.3	18s
ubuntu-20.04 head	16s
macos-14 2.7	46s
macos-14 3.0	22s
macos-14 3.1	29s
macos-14 3.2	20s
macos-14 3.3	21s
macos-14 head	21s
macos-13 2.7	1m 38s
macos-13 3.0	40s
macos-13 3.1	38s
macos-13 3.2	41s
macos-13 3.3	43s
macos-13 head	34s
windows-latest 2.7	2m 59s
windows-latest 3.0	1m 50s
windows-latest 3.1	2m 30s
windows-latest 3.2	2m 52s
windows-latest 3.3	2m 49s
windows-latest ucrt	1m 52s
windows-latest mswin	1m 39s
ubuntu-20.04 jruby	1m 21s
ubuntu-20.04 jruby-head	1m 23s
	31m 51s

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