Update 'Motion planning for a MoveIt 2 arm' link on Demos page

[christophebedard]

See osrf/ros2_test_cases#959

The "Motion planning for a MoveIt 2 arm" link is being redirected from http://moveit2_tutorials.picknik.ai/ to https://moveit.picknik.ai/humble/index.html, so update the link.

There is https://moveit.picknik.ai/main/index.html (for Rolling), but there are no versions for other ROS 2 distros, so I just used the Humble version. Perhaps rolling could point to https://moveit.picknik.ai/main/index.html and Iron and older can point to https://moveit.picknik.ai/humble/index.html?

[clalancette]

There is https://moveit.picknik.ai/main/index.html (for Rolling), but there are no versions for other ROS 2 distros, so I just used the Humble version. Perhaps rolling could point to https://moveit.picknik.ai/main/index.html and Iron and older can point to https://moveit.picknik.ai/humble/index.html?

That seems reasonable to me, but I'm not entirely sure. @tylerjw can you comment here on what tutorials we should be pointing to for the different releases?

[tylerjw]

Thank you for tagging me. I am going to propose a change to that site tomorrow at our wg meeting that will affect this. The tldr is that the main branch of MoveIt supports humble/iron/rolling so we should stop directing people to any version of the tutorial site but the main one. I tried copying the ROS docs site last year with the multiversion stuff and am now regretting it because it just caused confusion.

[christophebedard]

Sounds good, I changed it to point to /main/.