[Fix #1377] Fix an error for `Rails/EnumSyntax` #379

Job	Run time
Check documentation syntax	16s
JRuby 9.4	2m 43s
Check the oldest supported RuboCop version	27s
Ruby 2.7	34s
Prism	33s
Ruby 3.0	28s
Ruby 3.1	30s
Ruby 3.2	26s
Ruby 3.3	22s
Ruby head	25s
	6m 44s

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