fixed syntax error - removed extra square bracket

vue-theme/src/components/sidebars/sidebar.vue

@@ -28,7 +28,7 @@ aside.sidebar
             ul.t-up
                 li
                     template(v-for="charaSet in charaSets") 
-                        router-link(:to="`/${type}/sorted/by-alpha#${charaSet[0]]}`")
+                        router-link(:to="`/${type}/sorted/by-alpha#${charaSet[0]}`")
                             p {{ charaSet }}
 
         //- p2p types and related posts