Update python-publish.yml

Author: davidfitzek

.github/workflows/python-publish.yml

@@ -25,5 +25,6 @@ jobs:
           path: .cache
           restore-keys: |
             mkdocs-material-
+      - run: python -m pip install -e . --no-deps
       - run: pip install mkdocstrings pymdown-extensions mkdocs-material mkdocstrings-python
       - run: mkdocs gh-deploy --force