Modified the sort to: Show the latest version of the Docker extension.

Hello,

We must modify the spell in order to really have the latest version which is the "Show the latest version of the Docker extension." section:

az vm extension image list-versions --publisher Microsoft.EnterpriseCloud.Monitoring --location westeurope --name OmsAgentForLinux --query "[].name" -o tsv | sort | tail -n 1
1.9.1 => This is not the latest version

az vm extension image list-versions --publisher Microsoft.EnterpriseCloud.Monitoring --location westeurope --name OmsAgentForLinux --query "[].name" -o tsv | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n | tail -n 1
1.13.40 => This is the latest version

---
#### Document Details

⚠ *Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.*

* ID: 75b43753-55c6-9a97-79e7-cb102ca16905
* Version Independent ID: b88b763f-9855-5a37-ab97-375e7438f8c9
* Content: [az vm extension image](https://docs.microsoft.com/en-us/cli/azure/vm/extension/image?view=azure-cli-latest#az_vm_extension_image_show)
* Content Source: [latest/docs-ref-autogen/vm/extension/image.yml](https://github.com/MicrosoftDocs/azure-docs-cli/blob/master/latest/docs-ref-autogen/vm/extension/image.yml)
* Service: **virtual-machines**
* GitHub Login: @rloutlaw
* Microsoft Alias: **routlaw**