Refs #23098. Piggyback fix fastddsgen version in .repos

Signed-off-by: Juan Lopez Fernandez <juanlopez@eprosima.com>

Author: juanlofer-eprosima

fastdds_python.repos

@@ -18,4 +18,4 @@ repositories:
     fastddsgen:
         type: git
         url: https://github.com/eProsima/Fast-DDS-Gen.git
-        version: 4.1.x
+        version: 4.0.x