Cast of "max_velocity" and "max_acceleration" values to double

[JorgePRamos]

Description

Propose solution for open issue #2776 which tackles the generation of the joint_limits.yaml by the MoveIt setup assistant in which the generated values are Integers when Double are expected. A cast to double has been made as an attempt to solve this issue in s simple way.

Checklist

• [x] Required by CI: Code is auto formatted using clang-format
• [x] Extend the tutorials / documentation reference
• [x] Document API changes relevant to the user in the MIGRATION.md notes
• [x] Create tests, which fail without this PR reference
• [x] Include a screenshot if changing a GUI
• [x] While waiting for someone to review your request, please help review another open pull request to support the maintainers

[github-actions[bot]]

This PR is stale because it has been open for 45 days with no activity. Please tag a maintainer for help on completing this PR, or close it if you think it has become obsolete.