Enabled trusted publisher for rubygems.org #52

Job	Run time
ruby-versions / Generate Ruby versions	2s
build (2.5 / ubuntu-latest)	18s
build (2.5 / windows-latest)	3m 4s
build (2.6 / ubuntu-latest)	18s
build (2.6 / macos-latest)	27s
build (2.6 / windows-latest)	1m 54s
build (2.7 / ubuntu-latest)	21s
build (2.7 / macos-latest)	26s
build (2.7 / windows-latest)	3m 21s
build (3.0 / ubuntu-latest)	7s
build (3.0 / macos-latest)	9s
build (3.0 / windows-latest)	1m 30s
build (3.1 / ubuntu-latest)	5s
build (3.1 / macos-latest)	11s
build (3.1 / windows-latest)	1m 13s
build (3.2 / ubuntu-latest)	6s
build (3.2 / macos-latest)	9s
build (3.2 / windows-latest)	1m 1s
build (3.3 / ubuntu-latest)	8s
build (3.3 / macos-latest)	9s
build (3.3 / windows-latest)	1m 26s
build (head / ubuntu-latest)	5s
build (head / macos-latest)	8s
build (head / windows-latest)	49s
build (jruby / ubuntu-latest)	19s
build (jruby / macos-latest)	17s
build (jruby / windows-latest)	1m 32s
build (jruby-head / ubuntu-latest)	21s
build (jruby-head / macos-latest)	19s
build (jruby-head / windows-latest)	1m 0s
build (truffleruby / ubuntu-latest)	12s
build (truffleruby / macos-latest)	13s
build (truffleruby-head / ubuntu-latest)	14s
build (truffleruby-head / macos-latest)	14s
	22m 8s

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