actually request a python version

Author: mshafer-NI

.github/workflows/PR.yml

@@ -49,6 +49,8 @@ jobs:
       - name: Set up Python
         id: setup-python
         uses: ni/python-actions/setup-python@9768589f3e50672173dad75a6fc181e4a85d33fa # v0.7.0
+        with:
+          python-version: ${{ matrix.python-version }}
       - name: Set up Poetry
         uses: ni/python-actions/setup-poetry@9768589f3e50672173dad75a6fc181e4a85d33fa # v0.7.0
       - name: Cache virtualenv