Update src/metric_model_reporter.h

Co-authored-by: GuanLuo <[email protected]>

src/metric_model_reporter.h

@@ -80,8 +80,8 @@ struct MetricReporterConfig {
 
  private:
   // Maps the metric family fullname to its lookup key. This field is required
-  // to find the lookup key given its fullname when users specify in the custom
-  // metric configuration "ModelMetrics".
+  // because the users are expected to configure metric configuration "ModelMetrics"
+  // with the full name displayed from metrics reporting while a different name is used internally .
   // All new histograms must update the map.
   const std::unordered_map<std::string, std::string> metric_map_ = {
       {"nv_inference_first_response_histogram_ms", kFirstResponseHistogram}};