[Fix #1377] Fix an error for `Rails/EnumSyntax` #380

Job	Run time
JRuby 9.4	2m 28s
Check the oldest supported RuboCop version	28s
Ruby 2.7	35s
Check documentation syntax	9s
Ruby 3.0	32s
Prism	27s
Ruby 3.1	25s
Ruby 3.2	24s
Ruby 3.3	20s
Ruby head	22s
	6m 10s

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