python version as string

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
         with:
-          python-version: 3.10
+          python-version: "3.10"
 
       - name: Install dependencies
         # https://docs.github.com/en/free-pro-team@latest/actions/guides/building-and-testing-python#installing-dependencies