Fix menu demo quotes

src/views/menu/MenuDoc.vue

@@ -108,7 +108,7 @@ toggle(event) {
 <Menu :model="items">
     <template #item="{item}">
         <router-link :to="item.to" custom v-slot="{href, route, navigate, isActive, isExactActive}">
-            <a :href="href" @click="navigate" :class="{'active-link': isActive, 'active-link-exact": isExactActive}>{{route.fullPath}}</a>
+            <a :href="href" @click="navigate" :class="{'active-link': isActive, 'active-link-exact': isExactActive}">{{route.fullPath}}</a>
         </router-link>
     </template>
 </Menu>