added Oxford comma to sitemap text

[emoore36]

Fixes #8514

What changes did you make?

• added comma to sitemap text

Why did you make the changes (we will use this info to test)?

• to increase sitemap page readability

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Screenshots of Proposed Changes To The Website (if any, please do not include screenshots of code changes)

Visuals before changes are applied

Site Map - Before

Visuals after changes are applied

Site Map - After

[github-actions]

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---

From your project repository, check out a new branch and test the changes.

git checkout -b emoore36-correct-comma-site-map-8514 gh-pages
git pull https://github.com/emoore36/website.git correct-comma-site-map-8514

[egcuriel]

Review ETA: 5/27/26 EOD
Availability: M-Sun (5 pm - 11 pm)

[egcuriel]

Hi @emoore36 !

I have reviewed this pull request and verified the following:

PR Verification:

• Pull Request uses the correct branch
• Original issue is linked
• Screenshots included
  • Before
  • After

Technical Verification:

• Issue requirements are addressed correctly
• Changes are accurately represented locally across viewports:
  • Desktop
  • Mobile
• No new console errors or warnings present
• No unresolved CodeQL alerts

Notes:

• Everything looks good on my end, keep up the good work!

Status: PR Approved

[mocodesss]

Review ETA: 5/27/26
Availability: Tuesday and Thursday after 4pm PT.

[mocodesss]

Nice job here! This is a very clean PR. Keep up the good work!

PR checklist:

• The issue has been correctly linked.
• In the issue, you've correctly assigned yourself.
• In the issue, you've correctly set the project status.
• In the issue, action items have correctly been checked off.
• The merge from and to branches have been correctly set.
• The CodeQL alerts have been correctly checked off.
• Relevant before and after pictures included.
• Tested changes... works on desktop and mobile.

One thing I will note: This is not actually an Oxford comma. An Oxford comma separates the last item in a list of items, before the "and" or "or". The addition of the comma is correct, but it is just a comma between two independent clauses. So, the naming of this PR is a little off, but other than that, nice job!