remain annotations clearer

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/readme-zh.md

@@ -102,7 +102,7 @@ Nacos Discovery Starter 默认集成了 Ribbon ，所以对于使用了 Ribbon
 
 	    @FeignClient(name = "service-provider")
 	    public interface EchoService {
-	        @RequestMapping(value = "/echo/{str}", method = RequestMethod.GET)
+	        @GetMapping(value = "/echo/{str}")
 	        String echo(@PathVariable("str") String str);
 	    }
 	    

spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/readme.md

@@ -105,7 +105,7 @@ The code of `nacos-discovery-consumer-example` project will be analyzed below, d
 
 	    @FeignClient(name = "service-provider")
 	    public interface EchoService {
-	        @RequestMapping(value = "/echo/{str}", method = RequestMethod.GET)
+	        @GetMapping(value = "/echo/{str}")
 	        String echo(@PathVariable("str") String str);
 	    }
 	    

spring-cloud-alibaba-examples/seata-example/business-service/src/main/java/com/alibaba/cloud/examples/HomeController.java

@@ -97,7 +97,7 @@ public class HomeController {
 	}
 
 	@GlobalTransactional(timeoutMills = 300000, name = "spring-cloud-demo-tx")
-	@RequestMapping(value = "/seata/feign", method = RequestMethod.GET, produces = "application/json")
+	@GetMapping(value = "/seata/feign", produces = "application/json")
 	public String feign() {
 
 		String result = storageService.storage(COMMODITY_CODE, ORDER_COUNT);