Fix deprecated Node.js 12 actions with update to Node.js 16 in python-linters.yml

Author: jeff-takaki

.github/workflows/python-linters.yml

@@ -17,14 +17,14 @@ jobs:
     runs-on: ubuntu-20.04
     needs: [python-files]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - name: Set up Python 3.6
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: 3.6.15
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v3
       with:
         path: ~/pip-cache
         key: pip-3.6-${{ github.sha }}
@@ -46,14 +46,14 @@ jobs:
     runs-on: ubuntu-20.04
     needs: [python-files]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - name: Set up Python 3.6
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: 3.6.15
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v3
       with:
         path: ~/pip-cache
         key: pip-3.6-${{ github.sha }}