Use private lookup for these handles #340

Job	Run time
ruby-versions / Generate Ruby versions	2s
windows-latest 2.7	3m 31s
windows-latest 3.0	1m 30s
windows-latest 3.1	1m 49s
windows-latest 3.2	2m 3s
windows-latest 3.3	2m 1s
windows-latest 3.4	3m 47s
windows-latest mingw	1m 47s
windows-latest mswin	1m 47s
	18m 17s

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