Update trace.graphqls

Fix typo

trace.graphqls

@@ -32,8 +32,8 @@ type BasicTrace {
 
 # Represent the conditions used for query TraceBrief
 input TraceQueryCondition {
-    # The value of 0 means all service.
-    serviceId: Int
+    # The value of 0 means all endpoints.
+    endpointId: Int
     traceId: String
     operationName: String
     # The time range of traces started