Add github handle field

[jazxbx]

Fixes #7050

What changes did you make?

-Add github-handle: on heart.md file

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

--This variable will eventually replace github and picture variables to reduce redundancy in the project file.

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 jazxbx-add-github-handle-7050 gh-pages
git pull https://github.com/jazxbx/website.git add-github-handle-7050

[andyphancode]

Availability: Throughout week
ETA: 6/25 EOD

[andyphancode]

• Changes in code appear correct
• Branching is correct
• PR summary contains necessary info

Everything looks good! Just wanted to ask for a more specific title for the Pull Request just for more organized book keeping. Maybe something like "Added github-handle to Tien Yuan section".

[mrodz]

Availability: every day 9AM-8PM
ETA: 6/25 7:45

[mrodz]

Good job!

• Good source branch and destination branch
• Linked issue number
• No visual changes
• The new YAML property uses a delimiter of whitespaces

I concord with @andyphancode that the name of the PR should include at least Tien Yuan's name. Once you rename the PR, make sure to re-request our reviews so that we can get your work merged!

Thanks for your time :)

[LRenDO]

Closing this as there were two issues for this change #7050 and #6941 and the PR for #6941 was just merged ( #7069 ). @jazxbx, apologies for the duplication of work. Please feel free to grab another first good issue.