Merge pull request #9334 from lesterw1/patch-2

Update Get-AzMetricDefinition to include a note (link) to list of sup…

Author: cormacpayne

src/Monitor/Monitor/help/Get-AzMetricDefinition.md

@@ -220,6 +220,9 @@ This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable
 
 ## NOTES
 
+More information about the supported metrics may be found at:
+https://docs.microsoft.com/en-us/azure/azure-monitor/platform/metrics-supported
+
 ## RELATED LINKS
 
 [Get-AzMetric](./Get-AzMetric.md)