Fix deadlinks in README

[ryanspain]

Purpose

Fixes deadlinks in README.md

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:

How to Test

N/A

What to Check

Affected links.

Other Information

N/A

[pamelafox]

Thanks so much!