Update ci.yml and nightly.yml

Signed-off-by: Antón Casas <antoncasas@eprosima.com>

Author: 4ntn

.github/workflows/ci.yml

@@ -40,6 +40,11 @@ jobs:
           # Installing micro-ROS prerequisites
           pip3 install catkin_pkg lark-parser empy colcon-common-extensions
 
+          if [ ${{ github.ref_name }} == "humble" ] || [ ${{ github.head_ref }} == *"humble"* ]; then
+            # Use empy version 3.3.4 for Humble
+            pip3 install empy==3.3.4
+          fi
+
           # Build with Serial USB transport
           west build -b disco_l475_iot1 $GITHUB_WORKSPACE/micro_ros_zephyr_module -p -- -DCONFIG_MICROROS_TRANSPORT_SERIAL_USB=y
 

.github/workflows/nightly.yml

@@ -49,6 +49,11 @@ jobs:
           # Installing micro-ROS prerequisites
           pip3 install catkin_pkg lark-parser empy colcon-common-extensions
 
+          if [ ${{ matrix.branch }} == "humble" ]; then
+            # Use empy version 3.3.4 for Humble
+            pip3 install empy==3.3.4
+          fi
+
           # Build with Serial USB transport
           west build -b disco_l475_iot1 $GITHUB_WORKSPACE/micro_ros_zephyr_module -p -- -DCONFIG_MICROROS_TRANSPORT_SERIAL_USB=y