docs(announcement): 添加客户黑名单数据过滤的注释说明

src/views/announcement/mixins/announcementIndex.js

@@ -564,6 +564,10 @@ export default {
                     row.categoryName = selectedCategory.name;
                 }
 
+                /**
+                 * 过滤后的客户黑名单数据
+                 * @type {Array<CustomerRecord>}
+                 */
                 const updateCustomerBlacklist = this.currentCustomerBlacklist.filter(customer => {
                     const ids = row.customerBlacklist.map(customer => customer.id);
                     return ids.includes(customer.id);