set initial ordering to relevance in the frontend component

frontend/src/components/CodebaseListSidebar.vue

@@ -141,7 +141,7 @@ const initializeFilterValues = () => {
   values.endDate = urlParams.get("publishedBefore")
     ? new Date(urlParams.get("publishedBefore")!)
     : null;
-  values.ordering = urlParams.get("ordering") || "-first_published_at";
+  values.ordering = urlParams.get("ordering") || "relevance";
 
   initialFilterValues.value = { ...values };
 };