github: Fix ruff job setup

Signed-off-by: Povilas Kanapickas <povilas@radix.lt>

.github/workflows/pylint.yml

@@ -7,15 +7,12 @@ on:
 jobs:
   lint-ruff:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ["3.11"]
     steps:
     - uses: actions/checkout@v3
-    - uses: actions/checkout@v3
-      name: Set up Python ${{ matrix.python-version }}
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v4
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: "3.11"
     - name: Analysing the code with ruff
       run: |
         pip install -r test-requirements.txt