docs: update readme

Author: kevwan

readme-cn.md

@@ -29,7 +29,7 @@
 
 ## 设计思路
 
-我们尝试把自己代入到作者的角色梳理一下并发工具可能的业务场景：
+我们尝试梳理一下并发工具可能的示例业务场景：
 
 1. 查询商品详情：支持并发调用多个服务来组合产品属性，支持调用错误可以立即结束。
 2. 商品详情页自动推荐用户卡券：支持并发校验卡券，校验失败自动剔除，返回全部卡券。

readme.md

@@ -31,7 +31,7 @@ Simple scenarios using `WaitGroup` can also meet the needs, but what if we need
 
 ## Design ideas
 
-Let's try to put ourselves in the author's shoes and sort out the possible business scenarios for the concurrency tool:
+Let's sort out the possible business scenarios for the concurrency tool:
 
 1. querying product details: supporting concurrent calls to multiple services to combine product attributes, and supporting call errors that can be ended immediately.
 2. automatic recommendation of user card coupons on product details page: support concurrently verifying card coupons, automatically rejecting them if they fail, and returning all of them.