ci: style checks change python version from 3.6 to 3.8

Problem: python 3.6 is end of life and is now cauing failures
for the ci pipeline linting and formatting stages.

Change python version to 3.8. Change black version to 22.3.0
to fix formatting error from new click release. This only
affects the ci linting and formatting checks.

.github/workflows/main.yml

@@ -29,13 +29,13 @@ jobs:
     steps:
     - uses: actions/setup-python@v1
       with:
-        python-version: 3.6
+        python-version: 3.8
     - uses: actions/checkout@v2
       with:
         ref: ${{ github.event.pull_request.head.sha }}
         fetch-depth: 0
     - name: install black
-      run: python3 -m pip install 'black==20.08.b1' --force-reinstall
+      run: python3 -m pip install 'black==22.3.0' --force-reinstall
     - name: check format
       run: ./scripts/check-format
 
@@ -45,7 +45,7 @@ jobs:
     steps:
     - uses: actions/setup-python@v1
       with:
-        python-version: 3.6
+        python-version: 3.8
     - uses: actions/checkout@v2
       with:
         ref: ${{ github.event.pull_request.head.sha }}