Add $ to Intermediate and Miscellaneous (backport #5351)

[mergify]

---

This is an automatic backport of pull request #5351 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of dda0a68 has failed:

On branch mergify/bp/humble/pr-5351
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit dda0a68.
  (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)

Changes to be committed:
	modified:   source/Tutorials/Intermediate/Tf2/Using-Stamped-Datatypes-With-Tf2-Ros-MessageFilter.rst
	modified:   source/Tutorials/Intermediate/URDF/Using-Xacro-to-Clean-Up-a-URDF-File.rst
	modified:   source/Tutorials/Intermediate/Writing-an-Action-Server-Client/Py.rst
	modified:   source/Tutorials/Miscellaneous/Building-Realtime-rt_preempt-kernel-for-ROS-2.rst

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   source/Tutorials/Intermediate/Tf2/Adding-A-Frame-Cpp.rst

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

[github-actions]

HTML artifacts: https://github.com/ros2/ros2_documentation/actions/runs/14684786279/artifacts/3015326279.

To view the resulting site:

1. Click on the above link to download the artifacts archive
2. Extract it
3. Open html-artifacts-5381/index.html in your favorite browser