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Rolled back: Ruby apps with Bundler 2.x now receive version 2.3.7

Change effective on 02 March 2022

This change was originally deployed but then rolled back after error reports:

The Ruby Buildpack now includes Bundler 2.3.7. Applications specifying Bundler 2.x in their Gemfile.lock will now receive bundler: 2.3.7.

Heroku-18 and Heroku-20 stack images updated OpenJDK 11.0.14.1 now available