Bump opencv-python from 4.5.5.64 to 4.8.1.78

Bumps [opencv-python](https://github.com/opencv/opencv-python) from 4.5.5.64 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] <[email protected]>

requirements.txt

@@ -6,7 +6,7 @@ requests == 2.32.3
 Pillow == 10.3.0
 beautifulsoup4 == 4.11.0
 polling == 0.3.0
-opencv-python == 4.5.5.64
+opencv-python == 4.8.1.78
 pymsteams == 0.2.2