fix: exclude mkdocs config from copier skip list

Remove the exclusion rule for .config/copier/mkdocs.yaml from the _skip_if_exists list in copier.yaml. This allows the mkdocs configuration file to be properly managed by copier during template updates, ensuring that documentation settings can be updated when the template changes.

Author: liblaf

copier.yaml

@@ -48,6 +48,7 @@ _skip_if_exists:
   - pyproject.toml
   - README.md
   - src/
+  - "!.config/copier/mkdocs.yaml"
 
 _subdirectory: template