build(multi_object_tracker): add missing diagnostic_updater dependency

[esteve]

Description

multi_object_tracker is missing a dependency for diagnostic_updater

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 ✅

Comparison is base (f4ea429) 15.22% compared to head (bd45555) 15.22%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6025   +/-   ##
=======================================
  Coverage   15.22%   15.22%           
=======================================
  Files        1751     1751           
  Lines      120898   120898           
  Branches    36778    36778           
=======================================
  Hits        18407    18407           
  Misses      81813    81813           
  Partials    20678    20678           

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <ø> (?)
total	15.22% <ø> (ø)		Carriedforward from f4ea429

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

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[YoshiRi]

Thanks, LGTM