Update cspell.json to ignore members' github handles

[buneeIsSlo]

Fixes #7099

What changes did you make?

• Updated spell check cspell.json to ignore members' GitHub handles.

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

• To ignore members' GitHub handles, which will reduce the number of false positives like: Unkown word

Screenshots of Proposed Changes of The Website

Visuals before changes are applied

• No visual changes.

Visuals after changes are applied

• No visual changes.

[github-actions]

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

git checkout -b buneeIsSlo-update-cspelljson-to-ignore-gh-handles-7099 gh-pages
git pull https://github.com/buneeIsSlo/website.git update-cspelljson-to-ignore-gh-handles-7099

[t-will-gillis]

Hey @buneeIsSlo Great job- branches are good, issue is linked, there are brief descriptions of what was changed and why, and code edits are clean.

I tested in my repo at guide-teams.md, and the examples of gtihub-handle: that include an entry are ignored.

Thank you for working on this!