chore(dependencies): update actions/setup-python action to v3

Author: renovate-bot

.github/workflows/push.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@master
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v3
         with:
           python-version: '3.8'
           architecture: 'x64'
@@ -24,7 +24,7 @@ jobs:
         python-version: ['3.6', '3.7', '3.8', '3.9']
     steps:
       - uses: actions/checkout@master
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
           architecture: 'x64'