[Misc] Update the python version in Pylint workflow for flake8. (#4572)

* remove

* Add pylint.

* Change the python version for pylint.
Co-authored-by: Steve <ubuntu@ip-172-31-34-29.ap-northeast-1.compute.internal>

.github/workflows/pylint.yml

@@ -9,7 +9,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v3
         with:
-          python-version: 3.7.4
+          python-version: 3.8.0
           architecture: x64
       - name: Checkout PyTorch
         uses: actions/checkout@master