Update python-linting.yml

actions/checkout and actions/setup-python to latest versions

Author: bkemper24

.github/workflows/python-linting.yml

@@ -14,9 +14,9 @@ jobs:
         python-version: [2.7, 3.5, 3.6, 3.7, 3.8]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies