Apparently poetry now needs python 3.9, ref snok/install-poetry#162

Author: burner1024

.github/workflows/requirements.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.9"
 
       - uses: actions/checkout@v4