broken styles with mkdocs-material 7.2.3

[ppanero]

Package version (if known): latest master/maint

Describe the bug

If we upgrade to mkdocs-material 7.2.3 the css/style breaks. For some reason the minified/stylesheets are not found (404).

Steps to Reproduce

1. Checkout master/maint
2. Unpin mkdocs-material
3. Install latest (>7.2.3)
4. mkdocs serve and visit the frontpage

Expected behavior

The docs page to load properly not as in the below screenshot.

Screenshots (if applicable)

Additional context

If we remove the customizations (custom_dir/extra_css) the page does not fail. Therefore, it is on us and not the main mkdocs-material package. Itried to find hardcoded stylesheet paths but didn't manage.

[fenekku]

closed via #669