Prevent a warning of "a candidate for gnu_printf format attribute" #683

# to view logs

Job	Run time
Ruby memcheck	48s
ruby-versions / Generate Ruby versions	2s
ubuntu-22.04 2.7	53s
ubuntu-22.04 3.0	31s
ubuntu-22.04 3.1	33s
ubuntu-22.04 3.2	29s
ubuntu-22.04 3.3	31s
ubuntu-22.04 head	1m 17s
ubuntu-22.04 jruby	1m 16s
ubuntu-22.04 jruby-head	1m 12s
macos-13 2.7	2m 33s
macos-13 3.0	35s
macos-13 3.1	42s
macos-13 3.2	58s
macos-13 3.3	38s
macos-13 head	40s
macos-13 jruby	1m 50s
macos-13 jruby-head	2m 32s
macos-14 2.7	50s
macos-14 3.0	19s
macos-14 3.1	31s
macos-14 3.2	20s
macos-14 3.3	19s
macos-14 head	19s
macos-14 jruby	54s
macos-14 jruby-head	40s
windows-latest 2.7	6m 0s
windows-latest 3.0	2m 14s
windows-latest 3.1	2m 51s
windows-latest 3.2	2m 28s
windows-latest 3.3	4m 22s
windows-latest head	2m 20s
windows-latest mswin	1m 6s
ubuntu-latest jruby-9.4	1m 8s
macos-latest truffleruby-head	48s
ubuntu-latest truffleruby-head	1m 53s
	47m 22s

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