Update python-package.yml

Author: Pytlicek

.github/workflows/python-package.yml

@@ -25,6 +25,7 @@ jobs:
     - name: Install Poetry
       uses: snok/install-poetry@v1
       with:
+          version: 1.8.2
           virtualenvs-create: true
           virtualenvs-in-project: true
           installer-parallel: true