Update the doc building action

.github/workflows/book.yml

@@ -30,23 +30,21 @@ jobs:
               uses: ts-graphviz/setup-graphviz@v1
 
             # install python
-            - name: Set up Python 3.8
+            - name: Set up Python 3.10
               uses: actions/setup-python@v4
               with:
-                python-version: 3.8
+                python-version: 3.10
 
-            # install dependencies
-            - name: Install dependencies
+            # set up pygom
+            - name: Build and install pygom
               run: |
                 python -m pip install --upgrade pip
-                pip install -r requirements.txt
-                pip install -r docs/requirements.txt
+                pip install .
 
-            # set up pygom
-            - name: Build and install pygom
+            # install dependencies
+            - name: Install documentation dependencies
               run: |
-                  python setup.py build
-                  python setup.py install
+                pip install -r docs/requirements.txt
 
             # build the book
             # TODO check which flags are needed, -W