fix show_recurrent in embed list

pages/embed/list.vue

@@ -11,10 +11,12 @@ export default {
     const title = query.title
     const tags = query.tags
     const places = query.places
+    const show_recurrent = !!query.show_recurrent
 
     let params = []
     if (places) { params.push(`places=${places}`) }
     if (tags) { params.push(`tags=${tags}`) }
+    if (show_recurrent) { params.push('show_recurrent=1') }
 
     params = params.length ? `?${params.join('&')}` : ''
     const events = await $axios.$get(`/export/json${params}`)