Update default center type fallback in PersonEdit.vue to "center" for consistency.

src/Bundle/ChillPersonBundle/Resources/public/vuejs/_components/OnTheFly/PersonEdit.vue

@@ -494,7 +494,7 @@ onMounted(() => {
         // if there is only one center, preselect it
         person.center = {
           id: config.centers[0].id,
-          type: (config.centers[0]).type ?? "chill_main_center",
+          type: (config.centers[0]).type ?? "center",
         };
       }
     });