test

Bump step-security/harden-runner from 2.17.0 to 2.18.0 #339

Job	Run time
ruby-versions / Generate Ruby versions	4s
build (2.5 / windows-latest)	1m 35s
build (2.6 / ubuntu-latest)	27s
build (2.6 / macos-latest)	38s
build (2.6 / windows-latest)	1m 52s
build (3.0 / macos-latest)	14s
build (2.7 / ubuntu-latest)	26s
build (2.5 / ubuntu-latest)	26s
build (2.7 / macos-latest)	32s
build (2.7 / windows-latest)	1m 53s
build (head / ubuntu-latest)	10s
build (mingw / windows-latest)	49s
build (3.1 / macos-latest)	16s
build (jruby-head / ubuntu-latest)	48s
build (jruby / ubuntu-latest)	36s
build (3.4 / windows-latest)	59s
build (3.3 / macos-latest)	16s
build (3.2 / ubuntu-latest)	12s
build (3.1 / windows-latest)	59s
build (3.2 / macos-latest)	12s
build (head / macos-latest)	12s
build (3.3 / ubuntu-latest)	13s
build (3.0 / windows-latest)	56s
build (mswin / windows-latest)	1m 11s
build (4.0 / ubuntu-latest)	12s
build (3.3 / windows-latest)	52s
build (4.0 / macos-latest)	16s
build (3.4 / macos-latest)	19s
build (3.2 / windows-latest)	1m 37s
build (4.0 / windows-latest)	1m 36s
build (3.4 / ubuntu-latest)	17s
build (truffleruby / macos-latest)	17s
build (3.1 / ubuntu-latest)	11s
build (3.0 / ubuntu-latest)	8s
build (truffleruby / ubuntu-latest)	26s
	22m 7s

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