Update ruby to version v275 #1271

Job	Run time
build.20-true	17m 27s
build.22-true	16m 16s
build.20-false	4m 42s
build.22-false	3m 28s
unit.heroku-20.buildpack-clojure	3m 50s
unit.heroku-22.buildpack-clojure	3m 15s
unit.heroku-20.buildpack-go	3m 22s
unit.heroku-22.buildpack-go	2m 52s
unit.heroku-20.buildpack-gradle	3m 22s
unit.heroku-22.buildpack-gradle	3m 30s
unit.heroku-20.buildpack-java	3m 29s
unit.heroku-22.buildpack-java	2m 44s
unit.heroku-20.buildpack-multi	3m 45s
unit.heroku-22.buildpack-multi	3m 3s
unit.heroku-20.buildpack-nodejs	3m 9s
unit.heroku-22.buildpack-nodejs	3m 13s
unit.heroku-20.buildpack-null	3m 40s
unit.heroku-22.buildpack-null	3m 17s
unit.heroku-20.buildpack-php	3m 59s
unit.heroku-22.buildpack-php	3m 10s
unit.heroku-20.buildpack-play	5m 10s
unit.heroku-22.buildpack-play	3m 33s
unit.heroku-20.buildpack-python	4m 24s
unit.heroku-22.buildpack-python	3m 25s
unit.heroku-20.buildpack-ruby	3m 33s
unit.heroku-22.buildpack-ruby	3m 4s
unit.heroku-20.buildpack-scala	4m 32s
unit.heroku-22.buildpack-scala	3m 34s
unit.heroku-20.buildpack-static	3m 37s
unit.heroku-22.buildpack-static	3m 31s
	2h 13m 56s

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