Use default RUBY_CC_VERSION from rcd #1023

Job	Run time
Bundle install in Dockerfile	1m 4s
oxi-test (ruby=3.0, os=ubuntu-latest)	1m 0s
oxi-test (ruby=3.2, os=ubuntu-latest)	1m 21s
oxi-test (ruby=3.3, os=ubuntu-latest)	1m 5s
oxi-test (ruby=3.0, os=windows-latest)	5m 14s
oxi-test (ruby=3.2, os=windows-latest)	3m 22s
oxi-test (ruby=3.3, os=windows-latest)	5m 32s
oxi-test (ruby=3.0, os=macos-latest)	52s
oxi-test (ruby=3.2, os=macos-latest)	53s
oxi-test (ruby=3.3, os=macos-latest)	1m 7s
magnus-0.5 (ruby=3.0, os=ubuntu-latest)	1m 45s
magnus-0.5 (ruby=3.2, os=ubuntu-latest)	1m 17s
magnus-0.5 (ruby=3.3, os=ubuntu-latest)	1m 34s
magnus-0.5 (ruby=3.0, os=windows-latest)	4m 33s
magnus-0.5 (ruby=3.2, os=windows-latest)	4m 4s
magnus-0.5 (ruby=3.3, os=windows-latest)	4m 58s
magnus-0.5 (ruby=3.0, os=macos-latest)	1m 10s
magnus-0.5 (ruby=3.2, os=macos-latest)	1m 3s
magnus-0.5 (ruby=3.3, os=macos-latest)	1m 1s
magnus-head (ruby=3.0, os=ubuntu-latest)	2m 2s
magnus-head (ruby=3.2, os=ubuntu-latest)	2m 10s
magnus-head (ruby=3.3, os=ubuntu-latest)	2m 28s
magnus-head (ruby=3.0, os=windows-latest)	6m 40s
magnus-head (ruby=3.2, os=windows-latest)	5m 3s
magnus-head (ruby=3.3, os=windows-latest)	5m 14s
magnus-head (ruby=3.0, os=macos-latest)	1m 32s
magnus-head (ruby=3.2, os=macos-latest)	1m 37s
magnus-head (ruby=3.3, os=macos-latest)	1m 36s
	1h 11m 17s

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