rmf_internal_msgs: 3.1.0-1 in 'iron/distribution.yaml' [bloom] (#37496)

* rmf_internal_msgs: 3.1.0-1 in 'iron/distribution.yaml' [bloom]

Author: Yadunund

iron/distribution.yaml

@@ -4253,7 +4253,7 @@ repositories:
     doc:
       type: git
       url: https://github.com/open-rmf/rmf_internal_msgs.git
-      version: main
+      version: iron
     release:
       packages:
       - rmf_charger_msgs
@@ -4271,11 +4271,11 @@ repositories:
       tags:
         release: release/iron/{package}/{version}
       url: https://github.com/ros2-gbp/rmf_internal_msgs-release.git
-      version: 3.0.2-3
+      version: 3.1.0-1
     source:
       type: git
       url: https://github.com/open-rmf/rmf_internal_msgs.git
-      version: main
+      version: iron
     status: developed
   rmf_ros2:
     doc: