Update tested documents and test dokuwiki_server.md in 9.0

[sspencerwire]

• Updated meta tags for cloud_server_using_nextcloud.md and
  apache-sites-enabled.md to show that they have been tested with 9.0
• Ran through the steps of the dokuwiki_server.md on Rocky Linux 9.0
  and made sure they worked plus:
  • updated the reference for PHP 8.0 with regard to 9.0

• added the missing "f" option to the tar ztvf dokuwiki-stable.tgz
  line
• Rearranged the firewall section to include firewalld and to note
  that the iptables procedure is deprecated as of Rocky Linux 9.0

Author checklist (Completed by original Author)

• Contribution a good fit for the Rocky project? Title and Author MetaTags inserted ?
• Is this a non-English contribution?
• If applicable, steps and instructions have been tested to work on a real system
• Did you perform an initial self-review to fix basic typos and grammatical correctness

Rocky Documentation checklist (Completed by Rocky team)

• 1st Pass (Check that document is good fit for project and author checklist completed)
• 2nd Pass (Technical Review - check for technical correctness)
• 3rd Pass (Basic Editorial Review)
• 4th Pass (Detailed Editorial Review and Peer Review)
• Final pass/approval (Final Review)