fix: Correct parsing of TS_NMDH for plexos parser

[pesap]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.81%. Comparing base (73087e2) to head (c95abca).

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   76.82%   76.81%   -0.01%     
==========================================
  Files          39       39              
  Lines        3836     3835       -1     
==========================================
- Hits         2947     2946       -1     
  Misses        889      889              

Files with missing lines	Coverage Δ
src/r2x/exporter/plexos.py	88.61% <100.00%> (ø)
src/r2x/exporter/utils.py	84.61% <ø> (ø)
src/r2x/parser/reeds.py	91.03% <ø> (ø)
src/r2x/parser/plexos.py	53.62% <0.00%> (-0.06%)	⬇️

[pesap]

Closed in favor of #100