Update disks-metrics.md

Because Storage analytics has the options to capture CRUD operations to logs and I have heard from few customers requesting the same option for the managed disk.

Where Azure will not have logging or access to the data inside the managed disk

Author: pranathipanyam

articles/virtual-machines/disks-metrics.md

@@ -45,6 +45,9 @@ The following metrics are available to get insight on VM and disk IO, throughput
 - **Temp Disk Write Bytes/Sec**: The number of bytes that are written in a second from the temporary disk.
 - **Temp Disk Write Operations/Sec**: The number of output operations that are written in a second from the temporary disk.
 
+  [!NOTE]
+> Azure Disk metrics cannot help in logging CRUD(Create, Read, Update, Delete) operations inside the managed disk.
+
 ## Bursting metrics
 The following metrics help with observability into our [bursting](disk-bursting.md) feature on our premium disks: