Update rubocop requirement from ~> 1.54.0 to ~> 1.55.0 #1641

Job	Run time
lint	12s
spec (macos-latest, 3.0)	30s
spec (macos-latest, 3.1)	1m 34s
spec (macos-latest, 3.2)	36s
spec (macos-latest, 3.3)	55s
spec (macos-latest, jruby)	2m 24s
spec (macos-latest, truffleruby)	3m 6s
spec (macos-latest, truffleruby+graalvm)	6m 17s
spec (ubuntu-latest, 3.0)	23s
spec (ubuntu-latest, 3.1)	23s
spec (ubuntu-latest, 3.2)	23s
spec (ubuntu-latest, 3.3)	28s
spec (ubuntu-latest, jruby)	1m 51s
spec (ubuntu-latest, truffleruby)	1m 55s
spec (ubuntu-latest, truffleruby+graalvm)	3m 16s
spec (windows-latest, 3.0)	2m 6s
spec (windows-latest, 3.1)	2m 13s
spec (windows-latest, 3.2)	2m 55s
spec (windows-latest, jruby)	4m 21s
spec (alpine-latest, 3.0)	32s
spec (alpine-latest, 3.1)	44s
spec (alpine-latest, 3.2)	29s
spec (alpine-latest, 3.3-rc)	39s
release	0s
	38m 12s

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