add comment for FeignAutoConfiguration

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/config/FeignAutoConfiguration.java

@@ -30,6 +30,10 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.lang.Nullable;
 
+/**
+ * Auto configuration for feign components.
+ * @author lepdou 2022-07-04
+ */
 @Configuration
 @ConditionalOnClass(name = {"feign.RequestInterceptor"})
 public class FeignAutoConfiguration {