Fix Project Badge Buttons

What does this MR do?

Corrects the border colour of the badge buttons on the project page.

Related to #64464 (moved)

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