Bump opencv-python from 4.5.3.56 to 4.8.1.78

Bumps [opencv-python](https://github.com/opencv/opencv-python) from 4.5.3.56 to 4.8.1.78.
- [Release notes](https://github.com/opencv/opencv-python/releases)
- [Commits](https://github.com/opencv/opencv-python/commits)

---
updated-dependencies:
- dependency-name: opencv-python
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,5 +1,5 @@
 click==8.0.1
 colorama==0.4.4
 numpy==1.21.2
-opencv-python==4.5.3.56
+opencv-python==4.8.1.78
 Pillow==10.0.1