update gitworkflow

Author: AnneHartebrodt

.github/workflows/static.yaml

@@ -21,7 +21,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install sphinx sphinx-rtd-theme sphinx-autodoc-typehints
+          pip install sphinx sphinx-rtd-theme sphinx-autodoc-typehints furo
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
           pip install . # Install the local package to make it importable