Update workflow file.

Author: Daniel Goshev

.github/workflows/django.yml

@@ -7,12 +7,8 @@ jobs:
       - uses: actions/checkout@v3
       - name: Build docker
         run: docker compose build
-      - name: Run isort
-        run: docker compose run django isort styleguide_example/ --check
-      - name: Run black
-        run: docker compose run django black styleguide_example/ --check
-      - name: Run flake8
-        run: docker compose run django flake8
+      - name: Run ruff
+        run: docker compose run django ruff check styleguide_example/
       - name: Run mypy
         run: docker compose run django mypy --config mypy.ini styleguide_example/
       - name: Run tests