Update project to Ruby 3.2.2
What does this MR do and why?
For: #1609 (closed), update to Ruby 3.2.2: https://www.ruby-lang.org/en/news/2023/03/30/ruby-3-2-2-released/.
This also includes an update to https://github.com/jaredmdobson/rack-livereload.
How to set up and validate locally
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Configure a local GitLab Docs environment: https://gitlab.com/gitlab-org/gitlab-docs/-/blob/main/doc/setup.md.
Merge request acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this merge request.