Update rubocop-rspec requirement from ~> 2.23.0 to ~> 2.24.0 #1682

Job	Run time
lint	12s
spec (alpine-latest, 3.0)	32s
spec (alpine-latest, 3.1)	41s
spec (alpine-latest, 3.2)	32s
spec (alpine-latest, 3.3-rc)	3m 20s
spec (macos-latest, 3.0)	43s
spec (macos-latest, 3.1)	36s
spec (macos-latest, 3.2)	37s
spec (macos-latest, 3.3)	53s
spec (macos-latest, jruby)	2m 4s
spec (macos-latest, truffleruby)	3m 19s
spec (macos-latest, truffleruby+graalvm)	6m 10s
spec (ubuntu-latest, 3.0)	18s
spec (ubuntu-latest, 3.1)	19s
spec (ubuntu-latest, 3.2)	19s
spec (ubuntu-latest, 3.3)	52s
spec (ubuntu-latest, jruby)	1m 48s
spec (ubuntu-latest, truffleruby)	3m 11s
spec (ubuntu-latest, truffleruby+graalvm)	3m 23s
spec (windows-latest, 3.0)	2m 1s
spec (windows-latest, 3.1)	1m 29s
spec (windows-latest, 3.2)	1m 39s
spec (windows-latest, jruby)	3m 53s
release	7s
	38m 58s

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