Incorrect Documentation links and supported FortiGate, FortiAnalyzer Versions

[movinalot]

README and docs.fortinet.com installation versions do not align

The Templates on the main branch have support for

• FGT: 7.2.5, 7.4.0 and latest
• FAZ: 7.2.2, 740

Documentation Links in the README point to 6.4 and 7.0

Launch a Demo Link on README points to repo branch 3.5.2

docs.fortinet.com has links for 6.4.0, 7.0.0, 7.2.0, 7.4.0 - The documentation shows autoscale as available on versions that are not in the current templates and does not list the version that autoscale is available on in the templates.

• 6.4.0 - https://docs.fortinet.com/document/fortigate-public-cloud/6.4.0/azure-administration-guide/161167/deploying-autoscaling-on-azure
• 7.0.0 - https://docs.fortinet.com/document/fortigate-public-cloud/7.0.0/azure-administration-guide/161167/deploying-autoscaling-on-azure
• 7.2.0 - https://docs.fortinet.com/document/fortigate-public-cloud/7.2.0/azure-administration-guide/161167/deploying-autoscaling-on-azure
• 7.4.0 - https://docs.fortinet.com/document/fortigate-public-cloud/7.4.0/azure-administration-guide/161167/deploying-autoscaling-on-azure