[#2776] Show date modified instead of end date for openstaande aanvragen

[pi-sigma]

Taiga: https://taiga.maykinmedia.nl/project/open-inwoner/task/2776

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.88%. Comparing base (08e3b2a) to head (dd53b35).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1409   +/-   ##
========================================
  Coverage    94.88%   94.88%           
========================================
  Files         1046     1046           
  Lines        38605    38605           
========================================
  Hits         36631    36631           
  Misses        1974     1974           

Flag	Coverage Δ
	94.88% <ø> (ø)

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