Fixes: #18568 Update mkdocstrings and adapt config (#18841)

* Fixes: #18568 Update mkdocstrings and adapt config

* Fixed some output formatting errors

When trying to compare the output from "mkdocstrings[python-legacy]==0.27.0" and
"mkdocstrings[python]==0.28.2" I encountered some HTML errors:
- <div> inside a <p>
- unescaped non-tags <pk>

docs/plugins/development/index.md

@@ -204,6 +204,7 @@ To ease development, it is recommended to go ahead and install the plugin at thi
 ```no-highlight
 $ pip install -e .
 ```
+
 More information on editable builds can be found at [Editable installs for pyproject.toml ](https://peps.python.org/pep-0660/).
 
 ## Configure NetBox