Bump up 3.1.7 #399

Job	Run time
ruby-versions / Generate Ruby versions	3s
ubuntu-latest 2.5	48s
ubuntu-latest 2.6	46s
ubuntu-latest 2.7	53s
ubuntu-latest 3.0	26s
ubuntu-latest 3.1	28s
ubuntu-latest 3.2	29s
ubuntu-latest 3.3	27s
ubuntu-latest debug	27s
ubuntu-latest head	24s
macos-latest 2.5	2m 35s
macos-latest 2.6	2m 21s
macos-latest 2.7	1m 34s
macos-latest 3.0	42s
macos-latest 3.1	35s
macos-latest 3.2	41s
macos-latest 3.3	50s
macos-latest debug	41s
macos-latest head	37s
macos-arm-oss 2.6	34s
macos-arm-oss 2.7	36s
macos-arm-oss 3.0	19s
macos-arm-oss 3.1	23s
macos-arm-oss 3.2	20s
macos-arm-oss 3.3	18s
macos-arm-oss debug	21s
macos-arm-oss head	17s
windows-latest 2.5	2m 28s
windows-latest 2.6	2m 36s
windows-latest 2.7	2m 56s
windows-latest 3.0	2m 15s
windows-latest 3.1	2m 14s
windows-latest 3.2	2m 31s
windows-latest 3.3	3m 36s
windows-latest head	1m 49s
windows-latest mingw	1m 40s
windows-latest mswin	1m 52s
	42m 52s

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