[Doc] Update supported OS information of 16.7

What does this MR do and why?

Related issue: #3953 (closed) | #3970 (closed)

• 增加对 AlmaLinux 9 和 RHEL 9 版本的说明
• 修改对 RHEL 8 的首个支持版本：从 16.0.0 改为 16.7.0

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