ci(docs): run migrations before building documentation

.github/workflows/pages.yml

@@ -26,6 +26,8 @@ jobs:
        run: |
          pip install poetry
          poetry install --with docs --with tests
+     - name: Run migrations
+       run: poetry run ./manage.py migrate
      - name: Build docs
        run: poetry run make -C "$GITHUB_WORKSPACE/docs" html
      - name: Build coverage