fix link to recently-moved MoveIt for ROS 1 tutorials

[v4hn]

As noted here: https://discourse.ros.org/t/move-of-nav2-and-moveit-repositories-at-github/37450/21?u=v4hn

[rhaschke]

Good starting point. But there are many more references to the old ros-planning org.
I think a PR should address all of them.

[v4hn]

My immediate concern was to get the MoveIt ROS one reference back working for users, not to fix the migration for the whole repository, with CI broken for different unrelated reasons at the moment.

But fair enough. I went through the repo with a few seds and changed all links and references.

One thing that popped up is that the github container registry is not migrated (yet?), e.g., ghcr.io/ros-planning/moveit2_tutorials. @henningkayser
I added the last commit to change those links for reference here, but it should not be merged yet.
Feel free to just drop that commit again if you are ok with merging the rest.

[rhaschke]

Thanks!

[henningkayser]

CI is currently failing because of ros2_kortex, which needs Kinovarobotics/ros2_kortex#159. I'll push a branch to generate new docker images, the registry is working as intended.