CI: Add Ruby 3.4 preview 1 #206

Job	Run time
RBS	11s
Linux, Cassandra 3, Ruby 3.0	1m 43s
RuboCop	17s
Linux, Cassandra 4, Ruby 3.0	1m 41s
macOS, Ruby 3.0	1m 44s
Linux, Cassandra 5, Ruby 3.0	1m 44s
macOS, Ruby 3.1	2m 1s
Linux, Cassandra 3, Ruby 3.1	1m 48s
macOS, Ruby 3.2	1m 54s
Linux, Cassandra 4, Ruby 3.1	1m 45s
macOS, Ruby 3.3	1m 16s
macOS, Ruby 3.4.0-preview1	1m 15s
Linux, Cassandra 5, Ruby 3.1	1m 53s
Linux, Cassandra 3, Ruby 3.2	1m 39s
Linux, Cassandra 4, Ruby 3.2	1m 42s
Linux, Cassandra 5, Ruby 3.2	1m 43s
Linux, Cassandra 3, Ruby 3.3	1m 48s
Linux, Cassandra 4, Ruby 3.3	1m 50s
Linux, Cassandra 5, Ruby 3.3	1m 43s
Linux, Cassandra 3, Ruby 3.4.0-preview1	1m 54s
Linux, Cassandra 4, Ruby 3.4.0-preview1	1m 44s
Linux, Cassandra 5, Ruby 3.4.0-preview1	1m 50s
	35m 5s

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