Update Elyra homepage content with new content

[akchinSTC]

Elyra Homepage : https://elyra-ai.github.io/website/ Elyra Webpage Repo: https://github.com/elyra-ai/website Read the Docs: https://elyra.readthedocs.io/en/latest/index.html

Information between our read the docs page and our homepage is out of sync and updated and could use a refresh.

[anhuong]

Hello, I am new to this project and to open source contributing but I would like to pick up this issue!

[ptitzler]

Thank you very much for volunteering! Much appreciated. I assigned you as requested.

[c-bommu]

Hi, can I please get assigned to this issue?