Add push_gem.yml to release #63

Job	Run time
ruby-versions / Generate Ruby versions	3s
build (3.4, macos-latest)	18s
build (3.4, ubuntu-latest)	22s
build (head, ubuntu-latest)	18s
build (3.4, windows-latest)	1m 17s
build (head, macos-latest)	17s
	2m 35s

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