Replace the 'Organizations' header link with a 'Rings' link to a new My Rings page

The main header currently has an "Organizations" link that goes to the Organizations page. This should become a "Rings" link that points to a new "My Rings" page instead. **Suggested:** - Rename the header navigation link from "Organizations" to "Rings". - Point it to a new "My Rings" page that shows the rings the user belongs to (rather than the current Organizations listing). **Where:** Main site header navigation.