fix hyperlink (apache#1155)

* fix hyperlink

* fix hyperlink again

README.md

@@ -180,9 +180,9 @@ spring-boot.version=2.*
 
 For more details, please refer to the following case configurations:
 
- * [dubbo-samples-annotation](dubbo-samples-annotation/case-configuration.yml) : A simple provider service with builtin zookeeper.
- * [dubbo-samples-api](dubbo-samples-api/case-configuration.yml) : A simple provider service with external zookeeper.
- * [dubbo-samples-chain](dubbo-samples-chain/case-configuration.yml) : A multiple services with external zookeeper.
- * [dubbo-samples-migration](dubbo-samples-migration/README.md) : A compatibility test with the provider and consumer have different dubbo version.
+ * [dubbo-samples-annotation](2-advanced/dubbo-samples-annotation/case-configuration.yml) : A simple provider service with builtin zookeeper.
+ * [dubbo-samples-api](1-basic/dubbo-samples-api/case-configuration.yml) : A simple provider service with external zookeeper.
+ * [dubbo-samples-chain](2-advanced/dubbo-samples-chain/case-configuration.yml) : A multiple services with external zookeeper.
+ * [dubbo-samples-migration](2-advanced/dubbo-samples-migration/README.md) : A compatibility test with the provider and consumer have different dubbo verison.
 
 That's it, then feel free to add more integration test for the Dubbo project, have fun.