Added dxl_interfaces in ci

Signed-off-by: Sungho Woo <[email protected]>

Author: sunghowoo

dynamixel_hardware_interface_ci.repos

@@ -3,3 +3,7 @@ repositories:
     type: git
     url: https://github.com/ROBOTIS-GIT/DynamixelSDK.git
     version: humble
+  dynamixel_hardware_interface/dynamixel_interfaces:
+    type: git
+    url: https://github.com/ROBOTIS-GIT/dynamixel_interfaces.git
+    version: humble