Use explicit checkout action and simplified pip commands

.gitea/workflows/ci.yml

@@ -10,13 +10,9 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
+      - name: Checkout
-        run: |
+        uses: actions/checkout@v4
-          ls -la
+      - name: Install
-          pwd
+        run: pip install -e . pytest pytest-asyncio
-      - name: Install dependencies
+      - name: Test
-        run: |
+        run: python -m pytest tests/ -v
-          pip install -e . pytest pytest-asyncio
-      - name: Run tests
-        run: |
-          python -m pytest tests/ -v