core: fix html errors in the javadoc

[Khoyo]

No description provided.

[codecov]

Codecov Report

Merging #2427 (6f4e7c5) into dev (e8e0790) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                dev    #2427   +/-   ##
=========================================
  Coverage     80.04%   80.04%           
  Complexity     1662     1662           
=========================================
  Files           237      237           
  Lines          7397     7397           
  Branches        943      943           
=========================================
  Hits           5921     5921           
  Misses         1135     1135           
  Partials        341      341           

Flag	Coverage Δ
core	83.35% <ø> (ø)

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

Impacted Files	Coverage Δ
...r/sncf/osrd/api/stdcm/UnavailableSpaceBuilder.java	94.87% <ø> (ø)
...sncf/osrd/api/stdcm/graph/BacktrackingManager.java	92.68% <ø> (ø)
.../java/fr/sncf/osrd/api/stdcm/graph/STDCMUtils.java	93.75% <ø> (ø)
...implementation/tracks/directed/TrackRangeView.java	90.90% <ø> (ø)
...n/java/fr/sncf/osrd/infra_state/api/TrainPath.java	66.66% <ø> (ø)

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