fix: update sphinx.yml

Author: dklbreitling

.github/workflows/sphinx.yml

@@ -33,7 +33,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.10' 
-      - run: pip install sphinx sphinxcontrib-napoleon sphinx-rtd-theme
+      - run: pip install -r requirements.txt
       - name: Build Sphinx Docs
         run: sphinx-build docs/source/ docs/build/
       - name: Setup Pages