style: fix typos in PlotJuggler config files

[kenji-miyake]

Description

Fixed typos in PlotJuggler config files.
Since I was not sure about the impact, I split the PR.

Related: #3617

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b173491) 13.72% compared to head (c8a52cc) 13.72%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3618   +/-   ##
=======================================
  Coverage   13.72%   13.72%           
=======================================
  Files        1397     1397           
  Lines       98263    98263           
  Branches    29238    29238           
=======================================
  Hits        13490    13490           
  Misses      70233    70233           
  Partials    14540    14540           

Flag	Coverage Δ		*Carryforward flag
differential	7.40% <ø> (?)
total	13.72% <ø> (ø)		Carriedforward from b173491

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