GEOPY-2538: Adjust target misfit down to account for number of NDV in data

[benk-mira]

GEOPY-2538 - Adjust target misfit down to account for number of NDV in data

[codecov]

Codecov Report

❌ Patch coverage is 92.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.21%. Comparing base (bf735bb) to head (d038478).
⚠️ Report is 11 commits behind head on develop.

Files with missing lines	Patch %	Lines
simpeg_drivers/components/data.py	66.66%	1 Missing ⚠️
...drivers/components/factories/directives_factory.py	88.88%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #292   +/-   ##
========================================
  Coverage    91.21%   91.21%           
========================================
  Files          114      114           
  Lines         6178     6192   +14     
  Branches       755      757    +2     
========================================
+ Hits          5635     5648   +13     
  Misses         345      345           
- Partials       198      199    +1     

Files with missing lines	Coverage Δ
simpeg_drivers/driver.py	83.51% <100.00%> (+0.36%)	⬆️
simpeg_drivers/options.py	96.07% <ø> (ø)
simpeg_drivers/components/data.py	92.51% <66.66%> (-0.04%)	⬇️
...drivers/components/factories/directives_factory.py	97.89% <88.88%> (-0.39%)	⬇️

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