update src/components/Dialog/src/Dialog.vue.

解决了弹窗默认top为0的问题

Signed-off-by: AKING <2734339436@qq.com>
(cherry picked from commit d74f96fe17fa6a64532bd055df2a8ecc8a603636)

src/components/Dialog/src/Dialog.vue

@@ -65,7 +65,6 @@ const dialogStyle = computed(() => {
     destroy-on-close
     lock-scroll
     draggable
-    top="0"
     class="com-dialog"
     :show-close="false"
   >