chore: updating list of manual checks (#9666)

.github/PULL_REQUEST_TEMPLATE.md

@@ -25,6 +25,7 @@ https://docs.communityhealthtoolkit.org/contribute/code/workflow/#commit-message
 
 # Code review checklist
 <!-- Remove or comment out any items that do not apply to this PR; in the remaining boxes, replace the [ ] with [x]. -->
+- [ ] UI/UX backwards compatible: Test it works for the new design (enabled by default). And test it works in the old design, enable `can_view_old_navigation` permission to see the old design.
 - [ ] Readable: Concise, well named, follows the [style guide](https://docs.communityhealthtoolkit.org/contribute/code/style-guide/), documented if necessary.
 - [ ] Documented: Configuration and user documentation on [cht-docs](https://github.com/medic/cht-docs/)
 - [ ] Tested: Unit and/or e2e where appropriate