fix(modal): fix modal's demos

Author: shenjunjian

examples/sites/demos/pc/app/modal/message-close-composition-api.vue

@@ -10,7 +10,7 @@
 import { TinyButton, TinyModal } from '@opentiny/vue'
 
 function btnClick() {
-  TinyModal.confirm({
+  TinyModal.message({
     status: 'info',
     message: '自定义消息的内容可关闭,5s 后得自动关闭',
     messageClosable: true,

examples/sites/demos/pc/app/modal/message-id-composition-api.vue

@@ -10,7 +10,7 @@
 import { TinyButton, TinyModal } from '@opentiny/vue'
 
 function btnClick() {
-  TinyModal.confirm({
+  TinyModal.message({
     status: 'info',
     message: '自定义消息具有唯一 id，所以不会重复出现',
     id: 'unique'

examples/sites/demos/pc/app/modal/message-top-composition-api.vue

@@ -10,7 +10,7 @@
 import { TinyButton, TinyModal } from '@opentiny/vue'
 
 function btnClick() {
-  TinyModal.confirm({
+  TinyModal.message({
     status: 'info',
     message: '自定义消息的内容距离顶部500px',
     top: 500