docs(lanelet2_utils): simplify API table title for utils

[sarun-hub]

Description

Currently the API table title is the raw path of utils file (.hpp). It's slightly hard to see in the Table of Content.
This PR simplifies those titles.
Before:

After:

Related links

Parent Issue:

• Link

How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

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[github-actions]

Documentation URL: https://autowarefoundation.github.io/autoware_core/pr-851/
Modified URLs:

• https://autowarefoundation.github.io/autoware_core/pr-851/common/autoware_lanelet2_utils/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.83%. Comparing base (d091381) to head (08199c8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #851      +/-   ##
==========================================
+ Coverage   50.35%   50.83%   +0.47%     
==========================================
  Files         358      349       -9     
  Lines       22780    22450     -330     
  Branches    10120    10021      -99     
==========================================
- Hits        11472    11413      -59     
+ Misses      10203     9941     -262     
+ Partials     1105     1096       -9     

Flag	Coverage Δ		*Carryforward flag
daily-humble	50.64% <ø> (-0.09%)	⬇️	Carriedforward from f8885fd
daily-jazzy	50.11% <ø> (-0.11%)	⬇️	Carriedforward from f8885fd
differential-humble	37.65% <ø> (?)
differential-jazzy	37.59% <ø> (?)
total	50.38% <ø> (ø)		Carriedforward from f8885fd
total-humble	50.64% <ø> (-0.10%)	⬇️	Carriedforward from f8885fd
total-jazzy	50.11% <ø> (-0.11%)	⬇️	Carriedforward from f8885fd

*This pull request uses carry forward flags. Click here to find out more.

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[soblin]

LGTM