Fix a command in the Example code

I trust this was a typo or something. It cost me a VM (well, luckily, ARM lets us recover), but if this isn't fixed, others will copy-paste the example code, and will get wrong results!

Author: mcnemesis

src/ResourceManager/Compute/Commands.Compute/help/Remove-AzureRmVMSecret.md

@@ -23,7 +23,7 @@ The Remove-AzureRmVMSecret cmdlet removes (a) secret(s) from a virtual machine o
 
 ### Example 1
 ```
-PS C:\> Get-AzureRmVM -ResourceGroupName "rg1" -Name "vm1" | Remove-AzureRmVM | Update-AzureRmVM
+PS C:\> Get-AzureRmVM -ResourceGroupName "rg1" -Name "vm1" | Remove-AzureRmVMSecret | Update-AzureRmVM
 ```
 
 Removes all secrets from a virtual machine "vm1" in resource group "rg1" and update the VM