Update python-deploy-docs.yml

- ensure the project itself is installed
- closing  #33

Author: chrisbc

.github/workflows/python-deploy-docs.yml

@@ -70,9 +70,11 @@ jobs:
 
         #----------------------------------------------
         # build documentation
+        #  - we must also ensure that the project itself is installed
         #----------------------------------------------
       - name: build documentation
         run: |
+          poetry install --only-root
           poetry run mkdocs build
           
         #----------------------------------------------
@@ -89,4 +91,4 @@ jobs:
         #----------------------------------------------
       - name: Deploy Docs to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v4