Bump opencv-python-headless from 4.8.0.76 to 4.8.1.78 (#150)

Bumps [opencv-python-headless](https://github.com/opencv/opencv-python) from 4.8.0.76 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-headless
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -22,7 +22,7 @@ jikanpy==4.3.2
 lxml==4.9.3
 markdown2==2.4.10
 motor==3.3.1
-opencv-python-headless==4.8.0.76
+opencv-python-headless==4.8.1.78
 pillow==10.0.0
 pretty_errors==1.2.25
 psutil==5.9.5