fix(autoware_lanelet2_extension): fix links to issues in CHANGELOG.rst files

[esteve]

Description

This PR fixes the links to the issues in the CHANGELOG.rst file

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 15.01%. Comparing base (a2d5a6f) to head (7e1dbf5).
Report is 16 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #40      +/-   ##
==========================================
- Coverage   15.93%   15.01%   -0.93%     
==========================================
  Files          40       42       +2     
  Lines        2748     3670     +922     
  Branches     1339     1868     +529     
==========================================
+ Hits          438      551     +113     
- Misses       2222     2988     +766     
- Partials       88      131      +43     

Flag	Coverage Δ		*Carryforward flag
differential	16.09% <ø> (+0.14%)	⬆️
total	15.93% <ø> (ø)		Carriedforward from a2d5a6f

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

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