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/customization/export-templates.md

@@ -25,6 +25,7 @@ Height: {{ rack.u_height }}U
 To access custom fields of an object within a template, use the `cf` attribute. For example, `{{ obj.cf.color }}` will return the value (if any) for a custom field named `color` on `obj`.
 
 If you need to use the config context data in an export template, you'll should use the function `get_config_context` to get all the config context data. For example:
+
 ```
 {% for server in queryset %}
 {% set data = server.get_config_context() %}