updated opencv version for security

[pauladkisson]

Fixes https://github.com/catalystneuro/roiextractors/security/dependabot/3

[h-mayorquin]

Thanks, Paul.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.44%. Comparing base (36464df) to head (23c0581).
Report is 47 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1087   +/-   ##
=======================================
  Coverage   90.44%   90.44%           
=======================================
  Files         129      129           
  Lines        8055     8055           
=======================================
  Hits         7285     7285           
  Misses        770      770           

Flag	Coverage Δ
unittests	90.44% <ø> (ø)

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