Bump up v2.9.1 #696

Job	Run time
Ruby memcheck	1m 0s
ruby-versions / Generate Ruby versions	3s
ubuntu-22.04 2.7	1m 1s
ubuntu-22.04 3.0	31s
ubuntu-22.04 3.1	32s
ubuntu-22.04 3.2	36s
ubuntu-22.04 3.3	29s
ubuntu-22.04 head	1m 30s
ubuntu-22.04 jruby	1m 9s
ubuntu-22.04 jruby-head	1m 7s
macos-13 2.7	2m 37s
macos-13 3.0	40s
macos-13 3.1	46s
macos-13 3.2	40s
macos-13 3.3	1m 1s
macos-13 head	32s
macos-13 jruby	1m 5s
macos-13 jruby-head	1m 51s
macos-14 2.7	51s
macos-14 3.0	20s
macos-14 3.1	37s
macos-14 3.2	20s
macos-14 3.3	20s
macos-14 head	30s
macos-14 jruby	1m 40s
macos-14 jruby-head	41s
windows-latest 2.7	5m 7s
windows-latest 3.0	2m 39s
windows-latest 3.1	2m 58s
windows-latest 3.2	2m 31s
windows-latest 3.3	3m 7s
windows-latest head	1m 21s
windows-latest mswin	1m 49s
ubuntu-latest jruby-9.4	1m 6s
macos-latest truffleruby-head	40s
ubuntu-latest truffleruby-head	2m 5s
	45m 52s

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