chore(deps): bump rake from 13.0.6 to 13.1.0 in /buildpacks/buildpack-ruby/tests/ruby-sinatra #890

Job	Run time
build.20-true	27m 49s
build.22-true	25m 15s
build.20-false	7m 50s
build.22-false	7m 49s
unit.heroku-20.buildpack-clojure	6m 5s
unit.heroku-22.buildpack-clojure	5m 10s
unit.heroku-20.buildpack-go	4m 36s
unit.heroku-22.buildpack-go	4m 53s
unit.heroku-20.buildpack-gradle	4m 38s
unit.heroku-22.buildpack-gradle	5m 0s
unit.heroku-20.buildpack-java	6m 46s
unit.heroku-22.buildpack-java	5m 53s
unit.heroku-20.buildpack-multi	5m 21s
unit.heroku-22.buildpack-multi	5m 35s
unit.heroku-20.buildpack-nodejs	4m 59s
unit.heroku-22.buildpack-nodejs	5m 11s
unit.heroku-20.buildpack-null	4m 21s
unit.heroku-22.buildpack-null	4m 31s
unit.heroku-20.buildpack-php	4m 15s
unit.heroku-22.buildpack-php	4m 50s
unit.heroku-20.buildpack-play	5m 29s
unit.heroku-22.buildpack-play	5m 14s
unit.heroku-20.buildpack-python	5m 14s
unit.heroku-22.buildpack-python	4m 33s
unit.heroku-20.buildpack-ruby	6m 55s
unit.heroku-22.buildpack-ruby	5m 59s
unit.heroku-20.buildpack-scala	9m 56s
unit.heroku-22.buildpack-scala	8m 32s
unit.heroku-20.buildpack-static	6m 5s
unit.heroku-22.buildpack-static	5m 23s
	3h 34m 7s

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