decrement poetry version

Author: betaBison

.github/workflows/build.yml

@@ -32,6 +32,7 @@ jobs:
     - name: Install Poetry
       uses: snok/install-poetry@v1
       with:
+        version: 1.2.0
         virtualenvs-create: true
         virtualenvs-in-project: true
         installer-parallel: true # default option selected currently