fix: typo use thread_priority (backport #1844)

[mergify]

Fixed typo with the logs with the thread priority usage. Use the user set parameter thread priority rather than default kSchedPriority. If user doesn't set the thread_priority it will be defaulted to the kSchedPriority.

---

This is an automatic backport of pull request #1844 done by Mergify.

[mergify]

Cherry-pick of be0a339 has failed:

On branch mergify/bp/humble/pr-1844
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit be0a339.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   controller_manager/src/ros2_control_node.cpp

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.48%. Comparing base (ac9f005) to head (23c699e).
Report is 1 commits behind head on humble.

Additional details and impacted files

@@            Coverage Diff             @@
##           humble    #1847      +/-   ##
==========================================
- Coverage   62.51%   62.48%   -0.03%     
==========================================
  Files         108      108              
  Lines       12156    12156              
  Branches     8247     8247              
==========================================
- Hits         7599     7596       -3     
- Misses        879      881       +2     
- Partials     3678     3679       +1     

Flag	Coverage Δ
unittests	62.48% <ø> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
controller_manager/src/ros2_control_node.cpp	80.00% <ø> (ø)

... and 1 file with indirect coverage changes