Bump rack from 2.0.6 to 2.2.3 in /talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app#9

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dependabot/bundler/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/rack-2.2.3BeerCityCode/2019:dependabot/bundler/talks/ThomasWodarek-IntroToGoogleCloudPlatform/testtubeCode/app/rack-2.2.3Copy head branch name to clipboard