Build Ruby for GitHub Actions

Do not fail if `git commit` exits with non-zero, it means no changes #620

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Run time

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Job	Run time
build (ubuntu-22.04, ruby-3.4.6)	3s
build (macos-13, ruby-3.4.6)	11s
build (ubuntu-22.04-arm, ruby-3.4.6)	4s
build (ubuntu-24.04-arm, ruby-3.4.6)	6s
build (ubuntu-24.04, ruby-3.4.6)	4s
build (macos-14, ruby-3.4.6)	8s
buildJRubyWindows	0s
Create PR to setup-ruby	0s
	36s