Content - Create content for Ways to Contribute section

## Description
As a user,
I need a brief description for each heading of the following marked section
so that as a newcomer I understand the role of each team.

## Mocks
(develop content for section in red box only)

[design link](https://xd.adobe.com/view/0bfde3f8-de19-4c3d-61e9-0d11752d875d-7dcc/)

## Acceptance Criteria
### Update [Required]
Add descriptions for the following
- [ ] ways to contribute (one-liner welcoming text, asking them to check out our teams and other headings below it for more details).
- [ ] code
- [ ] documentation/training
- [ ] design
- [ ] testing
- [ ] outreach/research
- [ ] project management

## Definition of Done
- [ ] All of the required items are completed.
- [ ] Approval by 1 mentor.

## Estimation
3-5 days