fix: Correct parsing of TS_NMDH for plexos parser

[pesap]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 75.85%. Comparing base (45cda9b) to head (2c19b7f).

Files with missing lines	Patch %	Lines
src/r2x/parser/plexos.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #97      +/-   ##
==========================================
+ Coverage   75.72%   75.85%   +0.13%     
==========================================
  Files          38       38              
  Lines        3807     3811       +4     
==========================================
+ Hits         2883     2891       +8     
+ Misses        924      920       -4     

Files with missing lines	Coverage Δ
src/r2x/exporter/plexos.py	89.42% <100.00%> (+0.02%)	⬆️
src/r2x/exporter/utils.py	84.61% <100.00%> (+1.51%)	⬆️
src/r2x/parser/handler.py	87.96% <100.00%> (+1.29%)	⬆️
src/r2x/parser/reeds.py	90.93% <100.00%> (+0.68%)	⬆️
src/r2x/parser/plexos.py	53.07% <0.00%> (-0.06%)	⬇️