fix linting issue with type comparison

[zacharyburnett]

blocks #354

Checklist

• Added entry in CHANGES.rst under the corresponding subsection
• updated relevant tests
• updated relevant documentation
• Passed romancal regression testing on Jenkins / PLWishMaster. Link: https://plwishmaster.stsci.edu:8081/job/RT/job/romancal/XXX/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.55%. Comparing base (087a60d) to head (cbed49a).
Report is 50 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #356      +/-   ##
==========================================
- Coverage   97.56%   97.55%   -0.01%     
==========================================
  Files          30       36       +6     
  Lines        2788     3349     +561     
==========================================
+ Hits         2720     3267     +547     
- Misses         68       82      +14     

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[PaulHuwe]

LGTM