fix: install python via setup-python action in ci

Author: xnoto

.github/workflows/ci.yml

@@ -20,6 +20,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
       - name: pre-commit tests
         uses: pre-commit/action@v3.0.1