workflows: use poetry on pages.yml

Author: Sofia "dzshn" N. L

.github/workflows/pages.yml

@@ -15,13 +15,16 @@ jobs:
               with:
                   python-version: '3.10'
 
-            - name: Install pdoc
-              run: pip install pdoc
+            - name: Install poetry
+              run: curl -sSL https://install.python-poetry.org | python3 -
+
+            - name: Install project
+              run: poetry install
 
             - name: Build documentation
               run: |
                   cd docs
-                  ./build.sh
+                  poetry run ./build.sh
 
             - name: Upload pages
               uses: actions/upload-artifact@v2