Expand on Radius presentation page

[Reshrahim]

Thank you for helping make the Radius documentation better!

Please follow this checklist before submitting:

• Read the contribution guide
• Commands include options for Linux, MacOS, and Windows within codetabs
• New file and folder names are globally unique
• Page references use shortcodes instead of markdown or URL links
• Images use HTML style and have alternative text
• Places where multiple code/command options are given have codetabs

In addition, please fill out the following to help reviewers understand this pull request:

Description

This PR adds some additional details to the presentation page.

Issue reference

[AaronCrawfis]

The Call to Action slide formatting is a little off:

Instead of bullets, can we instead update the following slide?
. In a presentation we usually try to avoid giving more than 3 calls to action, as realistically the audience can't click/bookmark/take a picture of everything.

All links should be visible and not hyperlink embedded text, as you should assume this presentation is given on a projector in the front of the room where people can't click the links.

Overall maybe we just need to add a slide on the community calls, and then rely on the existing call to action slide?

[Reshrahim]

U mean add a slide for Community like below

And then rely on the existing last slide for other call to action ?

[Reshrahim]

As discussed, added a slide for community and retained the existing slide as call to action

[jasonviviano]

LGTM