fix: rename 'Nginx Status Codes' to 'Throughput' (#3419)

dashboard/src/main/home/app-dashboard/expanded-app/metrics/MetricsSection.tsx

@@ -262,7 +262,7 @@ const MetricsSection: React.FunctionComponent<PropsType> = ({
         selectedController={selectedController}
         selectedIngress={selectedIngress}
         selectedMetric="nginx:status"
-        selectedMetricLabel="Nginx Status Codes"
+        selectedMetricLabel="Throughput"
         selectedPod="All"
         selectedRange={selectedRange}
         pods={pods}