fix. gnb 1댑스 새창 아이콘 추가

layers/components/layouts/Header.vue

@@ -279,6 +279,9 @@ onMounted(() => {
                   @click="handleMenuClose"
                 >
                   <span>{{ gnbItem.menu_name }}</span>
+                  <AtomsIconsWebLinkLine
+                    v-if="gnbItem.link_target === '_blank'"
+                  />
                   <AtomsIconsArrowDownFill
                     v-if="has2depthButton(gnbItem)"
                     class="hidden md:block"
@@ -370,6 +373,7 @@ onMounted(() => {
                   <AtomsIconsStarFill />
                   <span>{{ tm('Gnb_Event') }}</span>
                   <AtomsIconsStarFill />
+                  <AtomsIconsArrowRightLine class="ml-auto md:hidden" />
                 </AtomsLocaleLink>
               </div>
             </div>