Fix README.md

[OidaTiftla]

I noticed the README.md seems some kind of outdated.

I tried to update the portions I could test.

• createQemu JSON Sample
• cloneQemu JSON Sample
• cloneQemu cloud-init JSON Sample

What I could not test in the createQemu JSON Sample:

• needed to remove the rng0 section:
  • error creating VM: 500 only root can set 'rng0' config
• needed to remove the usb0 section:
  • error creating VM: 500 only root can set 'usb0' config for real devices
• needed to remove the network section:
  • error creating VM: 500 no sdn vnet ID specified
• the disk section did not throw any errors, but the created VM also did not have the specified disk, maybe because I did not have a storage_type as dir configured?

I hope this helps the project. And if there is anything I can improve in this PR, I will appreciate your feedback.

[OidaTiftla]

Hi @Tinyblargon, I don't know what is the correct workflow and if I need to mention you on this pull request.

Let me known if there's anything I need to modify so this can be merged.

Kind regards,
OidaTiftla

[Tinyblargon]

@OidaTiftla Thank you for your contribution. Didn't realize the README had fallen so out of date.