Bump opencv-python from 4.6.0.66 to 4.7.0.68

Bumps [opencv-python](https://github.com/opencv/opencv-python) from 4.6.0.66 to 4.7.0.68.
- [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
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Hand-Motion-Detection/requirements.txt

@@ -1,3 +1,3 @@
 numpy==1.24.1
-opencv_python==4.6.0.66
+opencv_python==4.7.0.68
 mediapipe==0.9.0.1