Update PSMetricNoDetails.cs (#13676)

I assume the duplication of the word "properties" was a mistake. If it's talking about the properties belonging to a property, then it should be "property's properties".

src/Monitor/Monitor/OutputClasses/PSMetricNoDetails.cs

@@ -17,7 +17,7 @@
 namespace Microsoft.Azure.Commands.Insights.OutputClasses
 {
     /// <summary>
-    /// Wrapps around the Metric and exposes a summary of the properties properties
+    /// Wrapps around the Metric and exposes a summary of the property's properties
     /// </summary>
     public class PSMetricNoDetails : PSMetric
     {