Bump gh actions versions

Author: amorison

.github/workflows/tox.yml

@@ -18,11 +18,11 @@ jobs:
         py: ['3.8', '3.9', '3.10']
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.py }}
       - name: Update pip