fix(接口定义): 修复接口定义创建新mock时右上角保存与缩放连接在一起的样式缺陷 (#18179)

--bug=1017168 --user=王孝刚 【接口测试】接口定义创建新mock时右上角保存与缩放连接在一起
https://www.tapd.cn/55049933/s/1249721

Co-authored-by: wxg0103 <727495428@qq.com>

frontend/src/business/components/api/definition/components/mock/MockConfigHeader.vue

@@ -18,7 +18,8 @@
                         ref="tag"/>
         </el-col>
         <el-col :span="4">
-          <el-button type="primary" size="small" style="float: right;margin-right: 50px;" @click="saveMockExpectConfig"
+          <el-button size="mini" style="float: right;margin-right: 65px;margin-top: 5px" type="primary"
+                     @click="saveMockExpectConfig"
                      title="ctrl + s" v-permission="['PROJECT_API_DEFINITION:READ+EDIT_API']">{{
               $t('commons.save')
             }}