docs: polish readme docs. (#3181)

README-zh.md

@@ -51,7 +51,7 @@ Spring Cloud Alibaba 致力于提供微服务开发的一站式解决方案。
 更多组件请参考 [Roadmap](https://github.com/alibaba/spring-cloud-alibaba/blob/2022.0/Roadmap-zh.md)。
 
 ## 如何构建
-* 2022.x分支对应的是 Spring Cloud 2022 与 Spring Boot 3.0.x，最低支持 JDK 17。
+* 2022.x 分支对应的是 Spring Cloud 2022 与 Spring Boot 3.0.x，最低支持 JDK 17。
 * 2021.x 分支对应的是 Spring Cloud 2021 与 Spring Boot 2.6.x，最低支持 JDK 1.8。
 * 2020.0 分支对应的是 Spring Cloud 2020 与 Spring Boot 2.4.x，最低支持 JDK 1.8。
 * 2.2.x 分支对应的是 Spring Cloud Hoxton 与 Spring Boot 2.2.x，最低支持 JDK 1.8。

README.md

@@ -50,7 +50,7 @@ In addition to the above-mentioned features, for the needs of enterprise users'
 For more features please refer to [Roadmap](https://github.com/alibaba/spring-cloud-alibaba/blob/2022.x/Roadmap.md).
 
 ## How to build
-* **2022.x branch**: Corresponds to Spring 2022 & Spring Boot 3.0.x, JDK 17 or later versions are supported.
+* **2022.x branch**: Corresponds to Spring Cloud 2022 & Spring Boot 3.0.x, JDK 17 or later versions are supported.
 * **2021.x branch**: Corresponds to Spring Cloud 2021 & Spring Boot 2.6.x. JDK 1.8 or later versions are supported.
 * **2020.0 branch**: Corresponds to Spring Cloud 2020 & Spring Boot 2.4.x. JDK 1.8 or later versions are supported.
 * **2.2.x branch**: Corresponds to Spring Cloud Hoxton & Spring Boot 2.2.x. JDK 1.8 or later versions are supported.