Editing expert_contribution.md

[sspencerwire]

• Simplify title
• some passive voice correction
• update the /localdocs/index.md to reflect the addition of expert_contribution.md
• add some admonition in place of the Notes
• fix NvChad link (backed up too many times)
• simplify some sentences and reword some for clarity

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)

[github-actions]

Test results for 86d1750:

Number of broken URLs: 3

URL,RESULT,FILENAME
 http://$(hostname):8080,failed,guides/repositories/pulp_fetch_upload.md
 http://your_ip,failed,guides/cms/mediawiki.md
 https://dl.rockylinux.org/pub/rocky/9.6/live/x86_64/,failed,guides/desktop/kde_installation.md

[sspencerwire]

@metalllinux just finished editing the expert_contribution.md. Thanks again for your work on this. We do have problems with the document however, as .pyspelling.yml is not included and the change to the .markdownlint.yml is also missing. As stated earlier, we need to discuss this. I saw that there was some worry about having these in the root expressed in the discussion, BUT, if they are not in use by the contributor, these should not cause any issues. At least that is my take on them. We already include the .markdownlint.yml file and not every contributor uses that either. Thanks again!