Ruby 4: Update ruby-4.0 4.0.3->4.0.5

[Sharpie]

This update addresses CVE-2026-46727.

Checklist

I have:

• read the CONTRIBUTING.md document
• read and accepted the Developer Certificate of Origin document and added a Signed-off-by annotation to each of my commits
• read and accepted the AI Policy document and added Generated-by or Assisted-by annotations to each of my commits created with the help of an AI agent
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[Sharpie]

Removing the security label as we haven't made a release that includes the vulnerable version.