Update ruby-version to 3.0.5

[nschonni]

Bump to https://www.ruby-lang.org/en/news/2022/11/24/ruby-3-0-5-released/ to silence CI messages around warning: parser/current is loading parser/ruby30, which recognizes 3.0.5-compliant syntax, but you are running 3.0.4.

[shleeable]

Can you please update the dockerfile?

[nschonni]

I updated the Dockerfile to match, and there are 2 PRs that landed around the same time looking at Dependabot to keep those versions updated. Those PRs would likely still require a manual update to the .ruby-version file when they land