Update README.md

[idannof-imperva]

change sort order of "AWS Examples" section: move deployments that include all DSF components to appear first.

[lindanasredin]

I think it's better to put the PS/Customer examples before the POC/Lab ones because they are the main use case. So the overall order I'm suggesting is: DSF Single Account, DSF, Sonar Single Account, Sonar Multi Account, Sonar Basic, Sonar HADR, Sonar Upgrade. Please remove the Alpha from Sonar Upgrade while you're at it, it's there by mistake. Please also change the order in step 9 of "Installer Machine Deployment Mode".

[lindanasredin]

Please don't include the tree/raw change in this PR, I'm not sure it's valid. If necessary Gabi will create his PR again after your change. You can drop him a note if you want.

[lindanasredin]

Thanks a lot for replacing the sonar_basic_deployment with dsf_single_account_deployment, I thought it was too much so I didn't. However, it is better to put dsf_deployment because dsf_single_account_deployment requires additional steps - the user needs to provide the network infrastructure as input variables. Thank you you for your patience.