Specify python versions

.github/workflows/python-package.yml

@@ -17,6 +17,8 @@ jobs:
 
       - name: Set up Python
         uses: actions/setup-python@v3.1.2
+        with:
+          python-version: '3.x'
 
       - name: Install dependencies
         run: |
@@ -97,6 +99,8 @@ jobs:
 
       - name: Set up Python
         uses: actions/setup-python@v3.1.2
+        with:
+          python-version: '3.x'
 
       - name: Install dependencies
         run: |