Update metrics-supported.md

Set UsedCapacity Metric to Not Supported for "Microsoft.Storage/storageAccounts" resource type

Author: vikamala

articles/azure-monitor/essentials/metrics-supported.md

@@ -3316,7 +3316,7 @@ This latest update adds a new column and reorders the metrics to be alphabetical
 |SuccessE2ELatency|Yes|Success E2E Latency|Milliseconds|Average|The average end-to-end latency of successful requests made to a storage service or the specified API operation, in milliseconds. This value includes the required processing time within Azure Storage to read the request, send the response, and receive acknowledgment of the response.|GeoType, ApiName, Authentication|
 |SuccessServerLatency|Yes|Success Server Latency|Milliseconds|Average|The average time used to process a successful request by Azure Storage. This value does not include the network latency specified in SuccessE2ELatency.|GeoType, ApiName, Authentication|
 |Transactions|Yes|Transactions|Count|Total|The number of requests made to a storage service or the specified API operation. This number includes successful and failed requests, as well as requests which produced errors. Use ResponseType dimension for the number of different type of response.|ResponseType, GeoType, ApiName, Authentication|
-|UsedCapacity|Yes|Used capacity|Bytes|Average|The amount of storage used by the storage account. For standard storage accounts, it's the sum of capacity used by blob, table, file, and queue. For premium storage accounts and Blob storage accounts, it is the same as BlobCapacity or FileCapacity.|No Dimensions|
+|UsedCapacity|No|Used capacity|Bytes|Average|The amount of storage used by the storage account. For standard storage accounts, it's the sum of capacity used by blob, table, file, and queue. For premium storage accounts and Blob storage accounts, it is the same as BlobCapacity or FileCapacity.|No Dimensions|
 
 
 ## Microsoft.Storage/storageAccounts/blobServices