[FEATURE] Add `cache.ruby-lang.org` to allowlist

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement & Proposed Solution

Reopening #63049 after #51664 after #33622. Please add cache.ruby-lang.org or rather *.ruby-lang.org to default allowed domains (ruby-lang.org is already there in the _Ruby package managers_ section).

Priority

Medium - Would be very helpful