Update tests.yml

Former-commit-id: 34151675388701afa40220729a63b0d7b2fa2a7c

.github/workflows/tests.yml

@@ -12,8 +12,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+      - uses: actions/checkout@v3
 
-    - name: Check quality
-      run: |
-          make style && make quality
+      - name: Set up Python
+        uses: actions/setup-python@v3
+        with:
+          python-version: "3.8"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install black ruff
+
+      - name: Check quality
+        run: |
+            make style && make quality