(AzureCXP) fixes MicrosoftDocs/azure-docs#104180

Updating the metric `Average Response Time` to `Response Time` under monitor your app in step#1 Observe and monitor application behavior.

Author: Venkateshdodda-MSFT

articles/app-service/troubleshoot-performance-degradation.md

@@ -47,7 +47,7 @@ This option enables you to find out if your application is having any issues. In
 Some of the metrics that you might want to monitor for your app are
 
 * Average memory working set
-* Average response time
+* Response time
 * CPU time
 * Memory working set
 * Requests
@@ -163,4 +163,4 @@ You can also manage your app using Azure PowerShell. For more information, see
 
 ## More resources
 
-[Tutorial: Run a load test to identify performance bottlenecks in a web app](../load-testing/tutorial-identify-bottlenecks-azure-portal.md)
+[Tutorial: Run a load test to identify performance bottlenecks in a web app](../load-testing/tutorial-identify-bottlenecks-azure-portal.md)