Question 4 in 2.1 is not up to date 

Hi,

The answer in question 4 is not up to date : https://github.com/crpietschmann/Azure-70-532-Practice-Test/blob/ee436af09d3a20fe4f3ad88e1cdb8ab727c9dbc5/quiz/Azure_70-532_Objective_2.1.htm#L51

[Azure now support VHDX](https://docs.microsoft.com/en-us/azure/virtual-machines/windows/prepare-for-upload-vhd-image?toc=%2fazure%2fvirtual-machines%2fwindows%2ftoc.json)