Docs: Use branch name substitution for all links (backport #618)

[mergify]

This is an automatic backport of pull request #618 done by Mergify.
Cherry-pick of aece974 has failed:

On branch mergify/bp/humble/pr-618
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit aece974.
  (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:   admittance_controller/doc/userdoc.rst
	modified:   diff_drive_controller/doc/userdoc.rst
	modified:   doc/controllers_index.rst
	modified:   doc/writing_new_controller.rst
	modified:   effort_controllers/doc/userdoc.rst
	modified:   force_torque_sensor_broadcaster/doc/userdoc.rst
	modified:   forward_command_controller/doc/userdoc.rst
	modified:   imu_sensor_broadcaster/doc/userdoc.rst
	modified:   joint_state_broadcaster/doc/userdoc.rst
	modified:   position_controllers/doc/userdoc.rst
	modified:   tricycle_controller/doc/userdoc.rst
	modified:   velocity_controllers/doc/userdoc.rst

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   joint_trajectory_controller/doc/userdoc.rst

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

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[christophfroehlich]

Let's backport #634 first, then let mergifyio rebase this: @Mergifyio rebase

[destogl]

@Mergifyio rebase

[mergify]

rebase

❌ Base branch update has failed

Git reported the following error:

Rebasing (1/1)
Auto-merging joint_trajectory_controller/doc/userdoc.rst
CONFLICT (content): Merge conflict in joint_trajectory_controller/doc/userdoc.rst
error: could not apply 3a2f34e... Use branch name substitution for all links (#618)
hint: Resolve all conflicts manually, mark them as resolved with
hint: "git add/rm <conflicted_files>", then run "git rebase --continue".
hint: You can instead skip this commit: run "git rebase --skip".
hint: To abort and get back to the state before "git rebase", run "git rebase --abort".
Could not apply 3a2f34e... Use branch name substitution for all links (#618)

err-code: 2F4C9

[mergify]

This pull request is in conflict. Could you fix it @mergify[bot]?

[destogl]

@christophfroehlich is this OK?

[christophfroehlich]

@christophfroehlich is this OK?

-> #638

[christophfroehlich]

now its fine!