Downgrade pydocstyle

Author: esteve

.github/workflows/rust.yml

@@ -48,6 +48,10 @@ jobs:
         use-ros2-testing: true
         required-ros-distributions: ${{ matrix.ros_distribution }}
 
+    - name: Downgrade pydocstyle as a workaround for https://github.com/ament/ament_lint/issues/434
+      run: |
+        sudo pip install pydocstyle==6.1.1
+
     - name: Setup Rust
       uses: dtolnay/[email protected]
       with: