ci release: run as much as possible even when no tag push (#127) #387

Job	Run time
ruby-versions / Generate Ruby versions	4s
windows-latest 2.7	2m 0s
windows-latest 3.0	1m 7s
windows-latest 3.1	1m 11s
windows-latest 3.2	59s
windows-latest 3.3	2m 29s
windows-latest 3.4	3m 49s
windows-latest jruby-head	2m 2s
windows-latest mingw	1m 14s
windows-latest mswin	2m 41s
	17m 36s

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