Fix bug rendering labels in group wikis

What does this MR do?

In this MR we fix an error rendering labels in group wikis. The problem is that in EE, we need to pass the group to the Markdown Renderer.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Separation of EE specific content

Related to #285599 (closed)