[Fix #1053] Fix an error occurred for `Rails/FilePath` cop when nested `File.join` #564

Job	Run time
Check documentation syntax	14s
Spec - JRuby	1m 37s
Spec - 2.7	28s
Prism	29s
Spec - 3.0	50s
Spec - 3.1	17s
Check the oldest supported RuboCop version	27s
Spec - 3.2	14s
Spec - 3.3	14s
Spec - 3.4	12s
Spec - head	18s
	5m 20s

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