added shorts in firstRow section

vue-theme/src/pages/index.vue

     components: { card },
     data() {
         return {
-            firstRow: ['episode', 'exhibition', 'event', 'artist', 'post'],
+            firstRow: ['episode', 'exhibition', 'event', 'short', 'post'],
             secondRow: 'artist', // This is only ONE post
             thirdRow: ['episode', 'exhibition', 'event', 'artist', 'post'],
         }