fix functionality gap for decoration of django-filter fields #1007

[tfranzel]

No description provided.

[codecov]

Codecov Report

Patch coverage: 75.00% and project coverage change: -0.03 ⚠️

Comparison is base (dee630c) 98.59% compared to head (a0860bd) 98.56%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1010      +/-   ##
==========================================
- Coverage   98.59%   98.56%   -0.03%     
==========================================
  Files          68       68              
  Lines        8313     8321       +8     
==========================================
+ Hits         8196     8202       +6     
- Misses        117      119       +2     

Impacted Files	Coverage Δ
drf_spectacular/contrib/django_filters.py	89.57% <60.00%> (-0.94%)	⬇️
tests/contrib/test_django_filters.py	100.00% <100.00%> (ø)

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