fix: j1 and theta for FES type models

[tsutterley]

fix: nodal corrections for eps2 and eta2 when inferring for GOT5.5

[codecov]

Codecov Report

Attention: Patch coverage is 34.17722% with 52 lines in your changes missing coverage. Please review.

Project coverage is 72.53%. Comparing base (bd3d702) to head (d173d35).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
pyTMD/arguments.py	19.35%	49 Missing and 1 partial ⚠️
pyTMD/io/model.py	85.71%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #336      +/-   ##
==========================================
+ Coverage   71.65%   72.53%   +0.88%     
==========================================
  Files          39       39              
  Lines       11042    10268     -774     
  Branches     1522     1368     -154     
==========================================
- Hits         7912     7448     -464     
+ Misses       2632     2356     -276     
+ Partials      498      464      -34     

Flag	Coverage Δ
unittests	72.53% <34.17%> (+0.88%)	⬆️

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