tests: Update Ruby versions in the CI matrix #491

Job	Run time
CI (ubuntu-20.04, 3.0, test , spec)	1m 31s
CI (ubuntu-20.04, 3.0, test , spec)	1m 31s
CI (ubuntu-20.04, 3.1, test , spec)	1m 33s
CI (ubuntu-20.04, 3.1, test , spec)	1m 33s
CI (ubuntu-22.04, 3.2, test , spec)	1m 58s
CI (ubuntu-22.04, 3.2, test , spec)	1m 58s
CI (ubuntu-latest, 3.3, test , spec)	1m 49s
CI (ubuntu-latest, 3.3, test , spec)	1m 49s
CI (macos-latest, 3.3, test , spec)	1m 20s
CI (macos-latest, 3.3, test , spec)	1m 12s
CI (windows-latest, 3.3, test , spec)	3m 11s
CI (windows-latest, 3.3, test , spec)	3m 11s
CI (ubuntu-latest, 3.3, rubocop , integration , build , yardoc , linkinator)	30s
CI (ubuntu-latest, 3.3, rubocop , integration , build , yardoc , linkinator)	30s
	23m 36s

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