build(deps): bump opencv-python in /mask_detection_training/infer/files

Bumps [opencv-python](https://github.com/opencv/opencv-python) from 4.7.0.68 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]>

Author: dependabot[bot]

mask_detection_training/infer/files/requirements.txt

@@ -1,4 +1,4 @@
 numpy==1.24.1
-opencv_python==4.7.0.68
+opencv_python==4.8.1.78
 Pillow==10.0.1
 torch==2.7.0