Account for the mkdocs.yml file existing in the src directory

Author: tim-schilling

README.md

@@ -10,7 +10,7 @@ The repository that hosts the docs is at https://github.com/django-commons/djang
 2. Run `pip install mkdocs`
 3. Run `mkdocs serve`
 
-With uv: `uv run --python 3.13 --with mkdocs mkdocs serve`
+With uv: `uv run --python 3.13 --with mkdocs mkdocs serve -f src/mkdocs.yml`
 
 ### pre-commit