[Reference feedback]: ADE Decryption steps give an az disk create --upload-type error

### Type of issue

Code doesn't work

### Reference command name

az disk create

### Feedback

documentation page with issue https://learn.microsoft.com/en-us/azure/virtual-machines/disk-encryption-migrate

on this page is the following snippet:

```
# Get the source disk ID
SOURCE_DISK_ID=$(az disk show --resource-group "MyResourceGroup" --name "MySourceDisk" --query "id" -o tsv)

# Create a new disk from the source disk
az disk create --resource-group "MyResourceGroup" --name "MyTargetDisk"
--source "$SOURCE_DISK_ID" --upload-type "Copy"

# For OS disks, specify --os-type "Linux" or --os-type "Windows"
```

however with most current version of az cli installed (MacOS) this will generate an error like:

```
az disk create: 'Copy' is not a valid value for '--upload-type'. Allowed values: Upload, UploadWithSecurityData.
```

AZ version info

```
az --version
azure-cli 2.77.0

core 2.77.0
telemetry 1.1.0

Extensions:
account 0.2.5
aks-preview 13.0.0b2
alb 2.0.0
arcappliance 0.2.33
connectedmachine 0.6.0
connectedvmware 0.2.1
customlocation 0.1.3
k8s-extension 1.4.5

Dependencies:
msal 1.34.0b1
azure-mgmt-resource 23.3.0

Python location '/opt/homebrew/Cellar/azure-cli/2.77.0/libexec/bin/python'
Config directory '/Users/asomerset/.azure'
Extensions directory '/Users/asomerset/.azure/cliextensions'

Python (Darwin) 3.13.7 (main, Aug 14 2025, 11:12:11) [Clang 17.0.0 (clang-1700.0.13.3)]

Legal docs and information: aka.ms/AzureCliLegal

Your CLI is up-to-date.
```

the equivalent PS script does at least work as a workaround

### Page URL

https://learn.microsoft.com/en-us/azure/virtual-machines/disk-encryption-migrate

### Content source URL

_No response_

### Author

_No response_

### Document Id

_No response_