Readme Updates

[dpanta94]

All Submissions:

• Does your code follow the Extendables standards?
• Have you written new tests for your changes, as applicable?
• Have you successfully run tests with your changes locally?

Changes proposed in this Pull Request:

Not fixing an issue

How to test the changes in this Pull Request:

1. The plugin's wp.org page should contain the added sections and amended text and it should render correctly.

Other information:

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changelog entry

Add - Update plugin's readme

[gen4ik-saucal]

Good to go.