Fix build for Ruby 3.4 #1247

Job	Run time
Rubocop	28s
Legacy Ruby Builds (2.1.9)	2m 50s
Ruby 3.3	4m 32s
Legacy Ruby Builds (2.0)	2m 51s
Ruby 2.7 (Windows)	5m 47s
Ruby 3.2	4m 5s
Legacy Ruby Builds (1.9.3)	2m 31s
Ruby 2.6 (Windows)	4m 55s
Ruby 3.1	4m 12s
Legacy Ruby Builds (1.9.2)	5m 13s
Ruby 3.0	4m 25s
Ruby 2.5 (Windows)	4m 43s
Legacy Ruby Builds (1.8.7)	49s
Ruby 2.4 (Windows)	3m 24s
Ruby 2.7	4m 46s
Legacy Ruby Builds (REE)	3m 10s
Ruby 2.3 (Windows)	4m 28s
Ruby 2.6	5m 39s
Legacy Ruby Builds (JRuby 1.7)	11m 38s
Ruby 2.2 (Windows)	4m 24s
Ruby 2.5	5m 36s
Legacy Ruby Builds (JRuby 1.7 1.8 mode)	10m 10s
Ruby 2.4	4m 14s
Legacy Ruby Builds (JRuby 9.1.17.0)	13m 5s
Ruby 2.3	4m 14s
Ruby 2.2	4m 50s
Ruby ruby-head	41s
Ruby jruby-9.2.13.0	3m 1s
Ruby 2.7 with diff-lcs 1.3	4m 47s
Ruby 2.7 with diff-lcs 1.4.3	4m 50s
	2h 20m 18s

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