Update key-vault-linux.md

Author: msaenzbosupport

articles/virtual-machines/extensions/key-vault-linux.md

@@ -62,7 +62,7 @@ The Key Vault VM extension supports these Linux distributions:
 * Users can chose to upgrade their key vault vm extension version to `V2.0` to use full certificate chain download feature. Issuer certificates (intermediate and root) will be appended to the leaf certificate in the PEM file.
 
 * If you prefer to upgrade to `v2.0`, you would need to delete `v1.0` first, then install `v2.0`.
-```
+```azurecli
   az vm extension delete --name KeyVaultForLinux --resource-group ${resourceGroup} --vm-name ${vmName}
   az vm extension set -n "KeyVaultForLinux" --publisher Microsoft.Azure.KeyVault --resource-group "${resourceGroup}" --vm-name "${vmName}" –settings .\akvvm.json –version 2.0
 ```