readthedocs index and github readme differences

[Dottn]

Bug Report

The home page for https://dbachecks.readthedocs.io and the github readme are not in sync.
As a result, there's at least one typo in a cmdlet on readthedocs that has been fixed in the readme.

Description of Bug

The document provided to https://dbachecks.readthedocs.io/en/latest/
dbachecks/docs/index.md:

The github readme
dbachecks/readme.md