Add operational excellence category

Author: mudit794

src/Advisor/Advisor/Cmdlets/GetAzAdvisorRecommendation.cs

@@ -52,7 +52,7 @@ public class GetAzAdvisorRecommendation : ResourceAdvisorBaseCmdlet
         /// </summary>
         [Parameter(ParameterSetName = "IdParameterSet", Mandatory = false, HelpMessage = "Category of the recommendation")]
         [Parameter(ParameterSetName = "NameParameterSet", Mandatory = false, HelpMessage = "Category of the recommendation")]
-        [ValidateSet("Cost", "HighAvailability", "Performance", "Security")]
+        [ValidateSet("Cost", "HighAvailability", "OperationalExcellence", "Performance", "Security")]
         public string Category { get; set; }
 
         /// <summary>
@@ -96,4 +96,4 @@ public override void ExecuteCmdlet()
             this.WriteObject(results, true);
         }
     }
-}
+}