Update opencv-python requirement

Updates the requirements on [opencv-python](https://github.com/opencv/opencv-python) to permit the latest version.
- [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

@@ -4,7 +4,7 @@
 # Base ----------------------------------------
 matplotlib>=3.2.2
 numpy>=1.18.5
-opencv-python>=4.1.1,<=4.6.0.66
+opencv-python>=4.1.1,<=4.9.0.80
 Pillow>=7.1.2,<10.0.0
 PyYAML>=5.3.1
 requests>=2.23.0