fix replacement path

Author: wangzlei

sample-apps/http-server/go.mod

@@ -1,6 +1,6 @@
 module application.go
 
-replace github.com/aws/aws-xray-sdk-go => ../../../aws-xray-sdk-go
+replace github.com/aws/aws-xray-sdk-go => ./aws-xray-sdk-go
 
 require (
 	github.com/aws/aws-sdk-go v1.47.9