Bump opencv-python from 4.8.0.74 to 4.8.1.78

Bumps [opencv-python](https://github.com/opencv/opencv-python) from 4.8.0.74 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

@@ -2,7 +2,7 @@ certifi==2024.7.4
 exceptiongroup==1.1.3
 iniconfig==2.0.0
 numpy==1.25.2
-opencv-python==4.8.0.74
+opencv-python==4.8.1.78
 packaging==23.1
 pluggy==1.3.0
 pyasn1==0.5.0