Fix name of rmw_zenoh_pico in rosdistro_additional_recipes.yaml

Author: traversaro

rosdistro_additional_recipes.yaml

@@ -1,7 +1,7 @@
 # This file is used to add additional recipes to the ROS 2 distribution, not contained in the
 # upstream rosdistro. Differently from rosdistro_snapshot.yaml, this file is not
 # automatically generated, but manually maintained.
-:
+rmw_zenoh_pico:
   tag: 1.3.1
   url: https://github.com/esol-community/rmw_zenoh_pico.git
   version: 1.3.1