Add 3.1.1 entry #386

Job	Run time
ruby-versions / Generate Ruby versions	3s
ubuntu-latest 2.4	56s
windows-latest 2.4	4m 0s
ubuntu-latest 2.5	1m 4s
windows-latest 2.5	3m 56s
ubuntu-latest 2.6	1m 6s
macos-latest 2.6	1m 15s
windows-latest 2.6	4m 53s
ubuntu-latest 2.7	1m 10s
macos-latest 2.7	1m 16s
windows-latest 2.7	5m 53s
ubuntu-latest 3.0	11s
macos-latest 3.0	14s
windows-latest 3.0	3m 0s
ubuntu-latest 3.1	15s
macos-latest 3.1	16s
windows-latest 3.1	2m 2s
ubuntu-latest 3.2	13s
macos-latest 3.2	15s
windows-latest 3.2	1m 31s
ubuntu-latest 3.3	15s
macos-latest 3.3	12s
windows-latest 3.3	2m 42s
ubuntu-latest head	11s
macos-latest head	16s
ubuntu-latest jruby	1m 3s
macos-latest jruby	1m 6s
windows-latest jruby	2m 39s
ubuntu-latest jruby-head	1m 2s
macos-latest jruby-head	40s
windows-latest jruby-head	2m 40s
ubuntu-latest truffleruby	27s
macos-latest truffleruby	22s
ubuntu-latest truffleruby-head	34s
macos-latest truffleruby-head	28s
windows-latest mingw	1m 23s
windows-latest mswin	1m 32s
	51m 1s

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