Bump 1.7.5 #2220

Job	Run time
ruby-versions / Generate Ruby versions	1s
vterm-yamatanooroti 2.7 (latest reline)	1m 11s
vterm-yamatanooroti 2.7	1m 8s
vterm-yamatanooroti 3.0 (latest reline)	44s
vterm-yamatanooroti 3.0	1m 5s
vterm-yamatanooroti 3.1 (latest reline)	40s
vterm-yamatanooroti 3.1	51s
vterm-yamatanooroti 3.2 (latest reline)	44s
vterm-yamatanooroti 3.2	40s
vterm-yamatanooroti head (latest reline)	1m 44s
vterm-yamatanooroti head	43s
rake test 2.7 (latest reline)	46s
rake test 2.7	43s
rake test 3.0 (latest reline)	33s
rake test 3.0	35s
rake test 3.1 (latest reline)	33s
rake test 3.1	33s
rake test 3.2 (latest reline)	27s
rake test 3.2	39s
rake test head (latest reline)	30s
rake test head	29s
rake test truffleruby-head (latest reline)	6m 59s
rake test truffleruby-head	5m 39s
	27m 57s

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