Use private lookup for these handles (#113) #341

Job	Run time
ruby-versions / Generate Ruby versions	3s
windows-latest 2.7	4m 29s
windows-latest 3.0	2m 30s
windows-latest 3.1	2m 4s
windows-latest 3.2	2m 8s
windows-latest 3.3	1m 25s
windows-latest 3.4	2m 56s
windows-latest mingw	1m 30s
windows-latest mswin	1m 15s
	18m 20s

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