Bump github action versions

This should add some performance improvements in ci speed, and may
address the current issue of python 3.6 not found.

.github/workflows/core-tests.yml

@@ -13,9 +13,9 @@ jobs:
         python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies

.github/workflows/os-packages.yml

@@ -11,7 +11,7 @@ jobs:
         distro: [ buster, bionic, focal ]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
     - name: Test on ${{ matrix.distro }}
       run: |
         docker build .github/workflows/${{ matrix.distro }} -t local/${{ matrix.distro }}