skip TruffleRuby #160

Job	Run time
ruby-versions / Generate Ruby versions	2s
ubuntu-20.04 2.3	1m 37s
ubuntu-20.04 2.4	1m 8s
ubuntu-20.04 2.5	1m 32s
ubuntu-20.04 2.6	1m 23s
ubuntu-20.04 2.7	1m 21s
ubuntu-20.04 3.0	34s
ubuntu-20.04 3.1	35s
ubuntu-20.04 3.2	27s
ubuntu-20.04 head	32s
ubuntu-20.04 jruby	1m 38s
ubuntu-20.04 jruby-head	2m 0s
ubuntu-20.04 truffleruby	1m 0s
ubuntu-20.04 truffleruby-head	1m 22s
ubuntu-22.04 2.3	1m 12s
ubuntu-22.04 2.4	1m 7s
ubuntu-22.04 2.5	1m 9s
ubuntu-22.04 2.6	1m 27s
ubuntu-22.04 2.7	1m 18s
ubuntu-22.04 3.0	46s
ubuntu-22.04 3.1	29s
ubuntu-22.04 3.2	21s
ubuntu-22.04 head	31s
ubuntu-22.04 jruby	1m 30s
ubuntu-22.04 jruby-head	1m 44s
ubuntu-22.04 truffleruby	59s
ubuntu-22.04 truffleruby-head	1m 22s
macos-11 2.3	2m 10s
macos-11 2.4	3m 35s
macos-11 2.5	2m 0s
macos-11 2.6	2m 12s
macos-11 2.7	2m 5s
macos-11 3.0	3m 1s
macos-11 3.1	36s
macos-11 3.2	35s
macos-11 head	35s
macos-11 jruby	1m 16s
macos-11 jruby-head	1m 18s
macos-11 truffleruby	1m 25s
macos-11 truffleruby-head	1m 33s
macos-12 2.3	2m 27s
macos-12 2.4	4m 26s
macos-12 2.5	3m 31s
macos-12 2.6	2m 16s
macos-12 2.7	2m 10s
macos-12 3.0	38s
macos-12 3.1	27s
macos-12 3.2	44s
macos-12 head	47s
macos-12 jruby	1m 26s
macos-12 jruby-head	1m 37s
macos-12 truffleruby	2m 0s
macos-12 truffleruby-head	2m 15s
windows-latest 2.3	2m 43s
windows-latest 2.4	3m 16s
windows-latest 2.5	4m 34s
windows-latest 2.6	5m 44s
windows-latest 2.7	3m 20s
windows-latest 3.0	2m 54s
windows-latest 3.1	1m 44s
windows-latest 3.2	2m 22s
windows-latest head	1m 58s
ubuntu-latest jruby-9.1	1m 53s
ubuntu-latest jruby-9.2	2m 0s
ubuntu-latest jruby-9.3	1m 42s
	1h 50m 21s

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