ci(tests): bump setup-python version

Author: IATkachenko

.github/workflows/tests.yml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/checkout@v2.3.4
 
       - name: Prepare python ${{ matrix.python }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}