Add uint suffix (backport #4213)

[mergify]

The space_nav repo uses slightly stricter compiler flags that causes the modified lines to result in a docker build failure:

https://github.com/space-ros/docker/actions/runs/8406248510/job/23019919497

Fixing this upstream allows up to stay current with upstream repos

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This is an automatic backport of pull request #4213 done by Mergify.

[mergify]

Cherry-pick of 46ff0ec has failed:

On branch mergify/bp/iron/pr-4213
Your branch is up to date with 'origin/iron'.

You are currently cherry-picking commit 46ff0ecc.
  (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/rm <file>..." as appropriate to mark resolution)
	deleted by us:   nav2_graceful_controller/test/test_graceful_controller.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

[mergify]

@mergify[bot], all pull requests must be targeted towards the main development branch.
Once merged into main, it is possible to backport to @iron, but it must be in main
to have these changes reflected into new distributions.