update car docs in weekly repo maintenance (#33345)

* does this work?

* fix

* fix

* what
old-commit-hash: be8485ca89

.github/workflows/repo-maintenance.yaml

@@ -26,6 +26,11 @@ jobs:
         git config --global --add safe.directory '*'
         git -c submodule."tinygrad".update=none submodule update --remote
         git add .
+    - name: update car docs
+      run: |
+        scons -j$(nproc) --minimal opendbc
+        PYTHONPATH=. python selfdrive/car/docs.py
+        git add docs/CARS.md
     - name: Create Pull Request
       uses: peter-evans/create-pull-request@9153d834b60caba6d51c9b9510b087acf9f33f83
       with: