Fix dir in readme

Author: jinleileiking

example/social/README.md

@@ -4,6 +4,6 @@ A simple example of how to use struct fields as resolvers instead of methods.
 
 To run this server
 
-`go run ./example/field-resolvers/server/server.go`
+`go run ./example/social/server/server.go`
 
-and go to localhost:9011 to interact
+and go to localhost:9011 to interact