Added GitHub Handle Placeholder for Tugba

[palak-hellowrld]

Fixes #7435

What changes did you make?

• Added Github handle placeholder for Tugba Metinyurt

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

• To add the github-handle field for Tugba, per issue Add github-handle for Tugba Metinyurt in open-community-survey.md #7435 (no visible change yet, field is empty for now)

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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]

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

git checkout -b palak-hellowrld-add-github-4-tugba-7435 gh-pages
git pull https://github.com/palak-hellowrld/website.git add-github-4-tugba-7435

[yepezjuan]

Great work on setting up the PR, removing any uneccesary text/lines

Code additions is valid and does not disrupt website visuals