Add Github Handle for Gala Stojnic in design-systems.md

[izma-mujeeb]

Fixes #7287

What changes did you make?

• Using spaces, I added a variable called github-handle to hold Gala Stojnic's github handle

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

• The reason why I needed to add a variable to hold the github-handle was because the github-handle variable is used to replace each member in the leadership team's github and picture variables in the future. By replacing the github and picture variables, I am ensuring that the code is efficient and reducing any redundant code in the project file.

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

• No visual changes to the website

[github-actions]

Want to review this pull request? Take a look at this documentation for a step by step guide!

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

git checkout -b izma-mujeeb-add-github-handle-7287 gh-pages
git pull https://github.com/izma-mujeeb/website.git add-github-handle-7287

[vorleakyek]

It looks good! Approved!
One minor thing, including the person's name in the branch name for clarity might be good.
Thanks for contributing!

[8alpreet]

Review ETA: EOD Sep 4, 2024
Availability: 3pm to 7pm weekdays

[8alpreet]

Hi @izma-mujeeb,

What went well:

• PR title is descriptive and concise.
• Branch is named correctly.
• Correct line of code was changed.
• Issue is linked in PR comment.
• What section is answered well.

Changes Needed:

1. Why section:
   • I appreciate the level of detail you provided in this section; however, it is slightly inaccurate. The github-handle variable is not used to hold github and picture variables. Rather, that variable will replace both of the variables in the future.

[8alpreet]

Looks good. Thanks for applying the feedback!

[k-cardon]

Everything looks good to go! Branch is correct, line added correctly with spaces not tab, no visual changes to the site.