Bump Rubygems version to v3.4 in CI

Stan Hurequested to merge
sh-abstract-rubygems-version into master

What does this MR do and why?

This will be needed to support Ruby 3.1 and 3.2.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Edited by Stan Hu

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