Do not test Rails 7.0 against Ruby 3.4 dev #179

Job	Run time
Tests (2.7, rails_6.1, stable)	42s
Tests (2.7, rails_7.0, stable)	43s
Tests (2.7, rails_7.1, stable)	51s
Tests (3.0, rails_6.1, stable)	25s
Tests (3.0, rails_7.0, stable)	24s
Tests (3.0, rails_7.1, stable)	28s
Tests (3.1, rails_6.1, stable)	23s
Tests (3.1, rails_7.0, stable)	24s
Tests (3.1, rails_7.1, stable)	36s
Tests (3.1, rails_7.2, stable)	26s
Tests (3.2, rails_7.0, stable)	27s
Tests (3.2, rails_7.1, stable)	30s
Tests (3.2, rails_7.2, stable)	29s
Tests (3.3, rails_7.0, stable)	23s
Tests (3.3, rails_7.1, stable)	27s
Tests (3.3, rails_7.2, stable)	28s
Tests (3.1, rails_edge, experimental)	46s
Tests (3.2, rails_edge, experimental)	31s
Tests (3.3, rails_edge, experimental)	25s
Tests (head, rails_7.1, experimental)	1m 31s
Tests (head, rails_7.2, experimental)	1m 23s
Tests (head, rails_edge, experimental)	1m 28s
Coverage	2s
	14m 12s

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