fix document typo

Author: Joey Yang

README-zh.md

@@ -174,4 +174,4 @@ java -jar your-spring-boot-app.jar --spring.config.location=/path/to/config
 ## 开源许可证
 
 Spring Boot Dynamic Config is Open Source software released under
-the https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].
+the [Apache 2.0 license](https://www.apache.org/licenses/LICENSE-2.0.html).

README.md

@@ -174,4 +174,4 @@ NOTES:
 ## License
 
 Spring Boot Dynamic Config is Open Source software released under
-the https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].
+the [Apache 2.0 license](https://www.apache.org/licenses/LICENSE-2.0.html).