build

Bump step-security/harden-runner from 2.11.1 to 2.12.0 #1606

Job	Run time
ruby-versions / Generate Ruby versions	2s
build (2.6 / ubuntu-latest)	28s
build (2.6 / macos-latest)	31s
build (2.6 / windows-latest)	3m 22s
build (2.7 / ubuntu-latest)	37s
build (2.7 / macos-latest)	29s
build (2.7 / windows-latest)	4m 7s
build (3.0 / ubuntu-latest)	14s
build (3.0 / macos-latest)	14s
build (3.0 / windows-latest)	1m 23s
build (3.1 / ubuntu-latest)	15s
build (3.1 / macos-latest)	19s
build (3.1 / windows-latest)	3m 48s
build (3.2 / ubuntu-latest)	16s
build (3.2 / macos-latest)	13s
build (3.2 / windows-latest)	1m 36s
build (3.3 / ubuntu-latest)	18s
build (3.3 / macos-latest)	13s
build (3.3 / windows-latest)	1m 29s
build (3.4 / ubuntu-latest)	19s
build (3.4 / macos-latest)	13s
build (3.4 / windows-latest)	2m 2s
build (head / ubuntu-latest)	18s
build (head / macos-latest)	15s
build (truffleruby-head / ubuntu-latest)	48s
build (truffleruby-head / macos-latest)	34s
build (mingw / windows-latest)	2m 2s
build (mswin / windows-2022)	2m 33s
	28m 58s

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