Description of the optimized path wildcard

What does this MR do?

Description of the optimized path wildcard. Because adding /, can cause mismatch

See: gitlab-runner#4388

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content