Fix typos in steering_controllers_lib (backport #1464)

[mergify]

Ackermann is a proper name and should be used as such.

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This is an automatic backport of pull request #1464 done by Mergify.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 66.72%. Comparing base (76ff02c) to head (ab04494).
Report is 1 commits behind head on humble.

Files with missing lines	Patch %	Lines
...g_controller/src/ackermann_steering_controller.cpp	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           humble    #1466   +/-   ##
=======================================
  Coverage   66.72%   66.72%           
=======================================
  Files         113      113           
  Lines       13337    13337           
  Branches     8245     8245           
=======================================
  Hits         8899     8899           
  Misses       1442     1442           
  Partials     2996     2996           

Flag	Coverage Δ
unittests	66.72% <50.00%> (ø)

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

Files with missing lines	Coverage Δ
...roller/test/test_ackermann_steering_controller.hpp	81.81% <ø> (ø)
...ntroller/test/test_bicycle_steering_controller.hpp	77.77% <ø> (ø)
...llers_library/src/steering_controllers_library.cpp	71.20% <100.00%> (ø)
...library/test/test_steering_controllers_library.hpp	95.65% <ø> (ø)
...troller/test/test_tricycle_steering_controller.hpp	79.79% <ø> (ø)
...g_controller/src/ackermann_steering_controller.cpp	77.14% <0.00%> (ø)