Do not test Rails edge against Ruby < 3.2 #318

Job	Run time
Tests (2.7, rails_6.1, stable)	1m 46s
Tests (2.7, rails_7.0, stable)	2m 0s
Tests (2.7, rails_7.1, stable)	2m 13s
Tests (3.0, rails_6.1, stable)	26s
Tests (3.0, rails_7.0, stable)	24s
Tests (3.0, rails_7.1, stable)	28s
Tests (3.1, rails_6.1, stable)	31s
Tests (3.1, rails_7.0, stable)	23s
Tests (3.1, rails_7.1, stable)	26s
Tests (3.1, rails_7.2, stable)	33s
Tests (3.2, rails_7.0, stable)	23s
Tests (3.2, rails_7.1, stable)	27s
Tests (3.2, rails_7.2, stable)	31s
Tests (3.3, rails_7.0, stable)	26s
Tests (3.3, rails_7.1, stable)	31s
Tests (3.3, rails_7.2, stable)	31s
Tests (3.2, rails_edge, experimental)	29s
Tests (3.3, rails_edge, experimental)	33s
Tests (head, rails_7.1, experimental)	1m 49s
Tests (head, rails_7.2, experimental)	1m 41s
Tests (head, rails_edge, experimental)	1m 45s
Coverage	2s
	18m 18s

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