Virtual machine or bare metal - sort out list of the supported OSes

[osokin]

Describe the bug

For better visibility please keep list of the supported OSes sorted, i.e. RHEL / Rocky Linux 9 before Ubuntu.

To reproduce

Steps to reproduce the behavior:

1. Open https://docs.nginx.com/waf/install/virtual-environment/#platform-specific-instructions
2. View output
3. See issue

Expected behavior

List of the supported OSes needs to be sorted out.

Your environment

macOS/Chrome

Additional context

No any other context about the problem here.

Sensitive Information

No any sensitive information such as authentication credentials or license keys.

[mjang]

Internalish note: would it make sense to set up the list of supported OSes as an "include"