added github-handle to member Leah Ellis in civic-tech-jobs.md

[duojet2ez]

Fixes #6110

What changes did you make?

In _projects/civic-tech-jobs.md I replaced:

- name: Leah Ellis

with:

- name: Leah Ellis github-handle:

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

This was done in order to have an added variable called 'github handle' for leadership team member Leah Ellis.

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

No visual changes to website

[github-actions]

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

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

git checkout -b duojet2ez-add-new-variable-github-handle-leahEllis-6110 gh-pages
git pull https://github.com/duojet2ez/website.git add-new-variable-github-handle-leahEllis-6110

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Note that CONTRIBUTING.md cannot previewed locally; rather it should be previewed at this URL:

https://github.com/duojet2ez/website/blob/add-new-variable-github-handle-leahEllis-6110/CONTRIBUTING.md  

[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 no visible changes in developer mode on Chrome (desktop, tablet, and mobile view), Firefox, and Safari browser.

Going forward, please summarize the "What changes did you make?" in a sentence instead of copying the code block.

[jphamtv]

Hey @duojet2ez - Thanks for working on this issue. Your code change is clean, accurate, and correctly uses spaces. Great work!