feat: Bump ruleset to include support for short refs

What does this MR do?

Bumps ruleset to include new ability to specify ambiguous shortened refs.

See context ruleset!18 (merged)

What are the relevant issue numbers?

N/A

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer