Fix bullet point nesting in docs

[C-Loftus]

Overview

The nested lists on the main page of the documentation site (and a few other pages) are not rendering properly. The rst for nested bullet points is not using proper syntax of adding an extra newline before and after the nested level. Thus, the * are rendered inline. For an example see the bottom of the attached image. This commit just adds extra lines to make the docs render properly.

I referenced the rst syntax here.

Nested lists are possible, but be aware that they must be separated from the parent list items by blank lines:

This commit is relatively trivial but helps improve a11y and styling.

Dependency policy (RFC2) / Issues

N/A

Updates to public demo

N/A

Contributions and licensing

(as per https://github.com/geopython/pygeoapi/blob/master/CONTRIBUTING.md#contributions-and-licensing)

• [x] I'd like to contribute a docs fix to pygeoapi. I confirm that my contributions to pygeoapi will be compatible with the pygeoapi license guidelines at the time of contribution
• [x] I have already previously agreed to the pygeoapi Contributions and Licensing Guidelines

Before

After

[C-Loftus]

And of course if I am missing something here and this is a result of an autoformatter or something else in CI feel free to close

[tomkralidis]

Thanks @C-Loftus !