fix the error of server response time (#514)

diff --git a/src/graph/fragments/topology.ts b/src/graph/fragments/topology.ts
index c540d9b..452498a 100644
--- a/src/graph/fragments/topology.ts
+++ b/src/graph/fragments/topology.ts
@@ -157,7 +157,7 @@
     }
   }
   latencyS: getValues(metric: {
-    name: "service_relation_client_resp_time"
+    name: "service_relation_server_resp_time"
     ids: $idsS
   }, duration: $duration) {
     values {