actions: better image for lint

.github/workflows/default.yml

@@ -7,13 +7,12 @@ on:
 jobs:
     test-lint:
         runs-on: ubuntu-latest
+        container:
+            image: catthehacker/ubuntu:act-latest
         steps:
             - uses: actions/checkout@v3
               with:
                   fetch-depth: 0
-            - uses: https://github.com/actions/setup-python@v2
-              with:
-                python-version: 3.x
             - run: pip install --upgrade pip
             - run: pip install .[full] .[dev]
             - run: isort --check-only --diff .