az resource | exampl links need to be escaped in reference content

### Describe the bug

Please escape this example link with backticks so it does not cause a GitHub doc's build error.

Example URLs are frequently needed in our reference content -- they just need to be escaped to "escape" a doc's build error.

### Link that need update:
|File name | Link |
|-|-|
| latest/docs-ref-autogen/resource.yml | Link 'https://management.azure.com/subscriptions/{SubscriptionId}/resourceGroups/{ResourceGroup}/providers/Microsoft.Compute/virtualMachines/{VM}/powerOff?api-version={APIVersion}' points to a page that doesn't exist. Check the path or URL and update the link. |

### Related command

az resource

### Errors

n/a

### Issue script & Debug output

n/a

### Expected behavior

n/a

### Environment Summary

Azure CLI 2.62.0

### Additional context

_No response_