Section508.gov - Universal Design: What is it?

In search for VPAT https://www.section508.gov/blog/Universal-Design-What-is-it/

https://github.com/GSA/Section508.gov/blob/main/_posts/2017-12-13-blog-Universal-Design-What-is-it.md

Change:
> Launching accessibility initiatives so that customers can learn about accessible products through white papers and demos, understand how to configure products to achieve an accessible output, and view OpenACR reports to reinforce how products meet Section 508 WCAG 2.0](https://www.w3.org/TR/WCAG20/) guidelines.

TODO
- [ ] Any reason to keep references to WCAG 1.0?
- [ ] Plain language
- [ ] Link to OpenACR
- [ ] Decide to use OpenACR or ACR

Start with _posts/2017-12-13-blog-Universal-Design-What-is-it.md and compare the referenced article with the requested changes. Review the WCAG 1.0 references, plain-language wording, and OpenACR link or terminology. Done means the checklist decisions are resolved and the article reflects the agreed links and wording.

Written by the indexing model from the issue text.