Added new variable github-handle to member Andrew Steman in ballot-navmd

[Maarimar]

Fixes #6237

What changes did you make?

• Added new variable github-handle to member Andrew Steman in ballot-nav.md right bellow the name

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

• The one variable will replace two variables to reduce redundancy.

Screenshots of Proposed Changes Of The Website (if any, please do not screen shot code changes)

No visible changes to the website.

[github-actions]

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

git checkout -b Maarimar-new-variable-ballot-nav.md-6237 gh-pages
git pull https://github.com/Maarimar/website-HfLA.git new-variable-ballot-nav.md-6237

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https://github.com/Maarimar/website/blob/new-variable-ballot-nav.md-6237/CONTRIBUTING.md  

[aqandrew]

Hi @Maarimar, thank you for making this PR! You implemented the requested change in the correct file/branch, taking care to indent with spaces instead of tabs. I can confirm locally that your change doesn't affect the appearance of /projects/ballot-nav.

However, this PR closes issue #6237, correct? In keeping with our regular workflow, I think these changes need to be made:

• The first line of your original PR comment should be Fixes #6237, not Fixes #6553.
• You closed #6237 manually 2 days ago. Please reopen that issue. Once this PR is merged, the issue will be closed automatically, and we'll have a record that this PR is what closed it.

[heejung-hong]

Good work!

• The branches are correct and the issue is linked.
• The correct file was changed with the correct information.
• I have inspected and confirmed there are no changes in developer mode on Chrome (desktop, tablet, and mobile view), Firefox, and Safari browser.

Please note the edit made to your responses and use as an example going forward with future issues.

[jphamtv]

Hi @Maarimar - thanks for your contribution and for addressing the excellent feedback from @aqandrew and @heejung-hong. PR approved.

For future issues, after making requested changes, click the circular arrows icon next to the reviewer's name to request a new review. Thanks!

Confirmed the changes requested were completed