Summary
When you navigate to a Kanban board > Settings > Card colours and click in the link "Learn more about card colors.", the user is directed to a broken link, it goes to https://confluence.atlassian.com/display/JIRASOFTWARECLOUD/Customising+Cards instead of https://confluence.atlassian.com/jirasoftwarecloud/customizing-cards-764478020.html

Steps to reproduce
1. Navigate to a Kanban board
2. Go to the Board settings
3. Go to Card colors
4. Click the link "Learn more about card colors".

Expected Results
Go to the page Customizing cards

Actual Results
it's a broken link: https://confluence.atlassian.com/display/JIRASOFTWARECLOUD/Customising+Cards