Update iftop.md (add Ganna Zhyrnova to the list of contributors)

[SergeCroise]

• if the tag contributors exists, the list should not be empty

Author checklist (Completed by original Author)

• Good fit for the Rocky Linux project? Title and Author Metatags inserted ?
• If applicable, steps and instructions have been tested to work
• Initial self-review to fix basic typos and grammar completed

Rocky Documentation checklist (Completed by Rocky team)

• 1st Pass (Document is good fit for project and author checklist completed)
• 2nd Pass (Technical Review - check for technical correctness)
• 3rd Pass (Detailed Editorial Review and Peer Review)
• Final approval (Final Review)

[SergeCroise]

Hello @gannazhyrnova , hello @sspencerwire ,
Please review,
feel free to modify my changes or revert.

[github-actions]

Test results for 9e6d02f:

Number of broken URLs: 3

URL,RESULT,FILENAME
 https://www.linode.com/docs/guides/beginners-guide-to-lxd-reverse-proxy,failed,guides/containers/lxd_web_servers.md
 https://linoxide.com/install-cockpit-on-almalinux-or-rocky-linux/,failed,guides/security/firewalld-beginners.md
 https://oktools.net/regex,failed,books/sed_awk_grep/1_regular_expressions_vs_wildcards.md

[sspencerwire]

Hi @SergeCroise Neither @gannazhyrnova nor myself have edited this document yet. So adding either of us as a contributor at this point is not necessary. Thank you though!

[sspencerwire]

@SergeCroise Now I understand this PR. :-) I hadn't finished reviewing the PRs in the repository. You entered this as a draft, I'll see if I can undo that. Thank you again!