fix: added missing dependency

Signed-off-by: Esteve Fernandez <esteve@apache.org>

Author: esteve

rosidl_generator_rs/package.xml

@@ -24,6 +24,7 @@
  <!-- This is needed for the rosidl_message_type_support_t struct and visibility macros -->
  <build_export_depend>rosidl_generator_c</build_export_depend>
 
+ <exec_depend>rosidl_generator_c</exec_depend>
  <exec_depend>rosidl_parser</exec_depend>
 
  <test_depend>ament_cmake_gtest</test_depend>