adding drop down menu in navigation in about.html

[nikita24383]

New Mockup

Please check assets/css/global.css, design-assets folder images, and figma files for updated style guides. Any new pull request should use the updated color, spacing, and sizing variables.

No Bootstrap or jQuery

Please refrain from adding Bootstrap or jQuery to the site. These pr's will be closed. They overwrite global styles. Vanilla CSS and JS is way better now anyways 😊

New Task:

What is the task

<Detail the problem/task>

Who is the task for?

• [x] I created this task for me to complete, I will create a PR soon.
• [ ] I created this task for someone else to claim.
• [ ] I think this is a task that multiple people can do

Confirm all of the following:

• [x] I have looked at all the issues currently available and this does not exist or overlap with another ticket

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⚠️ PLEASE ONLY SUBMIT A PR FOR THIS TASK IF THIS TASK WAS AVAILABLE FOR YOU TO CLAIM

[brittneypostma]

When you create a pr, there should be a template that comes up with where you should write a description and a fixes: where you should link an open issue.