fix: install requirements for build

.github/workflows/python-publish.yml

@@ -26,6 +26,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install build
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Build package
       run: python -m build
     - name: Publish package