refactor(github): set poetry version 1.8.2

Author: SteBaum

.github/workflows/pull-request.yml

@@ -38,6 +38,7 @@ jobs:
       - name: Install Poetry
         uses: snok/install-poetry@v1
         with:
+          version: 1.8.2
           virtualenvs-create: true
           virtualenvs-in-project: true
           installer-parallel: true