Fix Markdown

[dshevtsov]

Purpose of this pull request

This pull request (PR) fixes MD007 - Unordered list indentation. It has not been detected by the GitHub check linting because the linter it uses cannot process an unordered sublist if its parent list is ordered. A note from the official documentation:

Note: This rule applies to a sublist only if its parent lists are all also unordered (otherwise, extra indentation of ordered lists interferes with the rule).

The violation was detected locally by the rake test implementation of the Markdown check.

[jeff-matthews]

Thanks @dshevtsov

[dobooth]

Thanks. I will run this one.

[ghost]

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