Update python-package.yml

install poetry before using it

.github/workflows/python-package.yml

@@ -35,6 +35,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        python -m pip install poetry==1.6.1
         poetry install        
         # python -m pip install pylint
         # if [ -f requirements.txt ]; then pip install -r requirements.txt; fi