Update README.md

Author: wenbinf

README.md

@@ -2564,7 +2564,7 @@ object App {
     val parameters = new java.util.HashMap[String, String]
 
     parameters.put("page", "2")
-    parameters.put("region_id", "93")
+    parameters.put("genre_id", "93")
     val response = objClient.fetchBestPodcasts(parameters)        
 
     println(response.toJSON().toString(2))