Add section with link to feedback issue
What does this MR do and why?
This MR updates https://docs.gitlab.com/ee/user/group/epics/epic_work_items.html to include a feedback section to point users to #463598 which is our designated feedback issue for this experience.
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Screenshots or screen recordings
NA
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.