Update opencv-contrib-python requirement from <=4.3.0.28 to <=4.8.1.78

[dependabot]

Updates the requirements on opencv-contrib-python to permit the latest version.

Release notes

Sourced from opencv-contrib-python's releases.

4.8.1.78

OpenCV 4.8.1 release.

Important changes:

• WebP security update for CVE-2023-4863

Commits

• See full diff in compare view

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