Fix format.yml

Author: rhaschke

.github/workflows/format.yml

@@ -16,4 +16,7 @@ jobs:
     - uses: actions/checkout@v4
     - name: Install clang-format-14
       run: sudo apt-get install clang-format-14
+    - uses: actions/setup-python@v5
+      with:
+        python-version: 3.x
     - uses: pre-commit/[email protected]