Fix condition in 3.1.3 entry #403

Job	Run time
ruby-versions / Generate Ruby versions	1s
ubuntu-24.04 2.7	35s
ubuntu-24.04 3.0	14s
ubuntu-24.04 3.1	9s
ubuntu-24.04 3.2	10s
ubuntu-24.04 3.3	15s
ubuntu-24.04 3.4	14s
ubuntu-24.04 debug	20s
ubuntu-24.04 head	14s
ubuntu-24.04 jruby-head	54s
ubuntu-24.04 truffleruby-head	29s
ubuntu-22.04 2.7	40s
ubuntu-22.04 3.0	13s
ubuntu-22.04 3.1	13s
ubuntu-22.04 3.2	11s
ubuntu-22.04 3.3	14s
ubuntu-22.04 3.4	9s
ubuntu-22.04 debug	23s
ubuntu-22.04 head	11s
ubuntu-22.04 jruby-head	57s
ubuntu-22.04 truffleruby-head	25s
	7m 11s

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