ci: update python

Author: rigor789

.github/workflows/test.yml

@@ -40,8 +40,9 @@ jobs:
         with:
           path: 'templates'
 
-      - name: Install Python
-        uses: actions/setup-python@v1
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3' 
 
       - uses: actions/setup-java@v2
         with:
@@ -72,7 +73,7 @@ jobs:
       - name: Setup
         working-directory: templates
         run: |
-          python -m pip install --upgrade pip six
+          python3 -m pip install --upgrade pip six
           npm i -g nativescript@next --ignore-scripts
           ns usage-reporting disable
           ns error-reporting disable