Bump for Iron: setup-ros -> 0.6.2 action-ros-ci -> 0.3.2

[moriarty]

• https://github.com/ros-tooling/setup-ros/releases/tag/0.6.2
• https://github.com/ros-tooling/action-ros-ci/releases/tag/0.3.2
  • 0.3.1 added Iron support
  • 0.3.2 added ref arg for scheduled jobs

[moriarty]

CC: @destogl I can't assign you as a reviewer to the PR so just tagging you in a comment