test

Bump step-security/harden-runner from 2.15.0 to 2.15.1 #174

Job	Run time
ruby-versions / Generate Ruby versions	4s
build (2.7 / windows-latest)	1m 7s
build (2.7 / ubuntu-latest)	24s
build (2.7 / macos-latest)	26s
build (3.1 / ubuntu-latest)	6s
build (3.0 / macos-latest)	12s
build (3.0 / windows-latest)	39s
build (3.1 / macos-latest)	12s
build (3.0 / ubuntu-latest)	6s
build (3.4 / ubuntu-latest)	8s
build (3.2 / macos-latest)	12s
build (3.3 / macos-latest)	11s
build (3.3 / windows-latest)	29s
build (head / ubuntu-latest)	6s
build (head / macos-latest)	12s
build (mingw / windows-latest)	32s
build (4.0 / windows-latest)	25s
build (3.1 / windows-latest)	30s
build (3.4 / windows-latest)	25s
build (3.2 / ubuntu-latest)	7s
build (3.2 / windows-latest)	1m 4s
build (mswin / windows-latest)	24s
build (3.4 / macos-latest)	10s
build (4.0 / macos-latest)	8s
build (4.0 / ubuntu-latest)	10s
build (3.3 / ubuntu-latest)	8s
	8m 37s

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