Bump opencv-contrib-python in /machine-learning/sift

Bumps [opencv-contrib-python](https://github.com/skvark/opencv-python) from 3.4.2.16 to 4.2.0.32.
- [Release notes](https://github.com/skvark/opencv-python/releases)
- [Commits](https://github.com/skvark/opencv-python/commits)

---
updated-dependencies:
- dependency-name: opencv-contrib-python
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

machine-learning/sift/requirements.txt

@@ -1,3 +1,3 @@
-opencv-contrib-python==3.4.2.16
+opencv-contrib-python==4.2.0.32
 opencv-python==3.4.2.16
 numpy