date sort change from by-date to by-past

vue-theme/src/components/navigation/navigation.vue

                     li
                         router-link(to="/exhibition/sorted/by-current-and-upcoming") Current/Upcoming
                     li
-                        router-link(to="/exhibition/sorted/by-date") Past
+                        router-link(to="/exhibition/sorted/by-past") Past
                     li
                         router-link(to="/object") Explore Craft Objects
             li.f-grow