pythonPackages.face_recognition: 1.2.1 -> 1.2.2

The following fixes have been applied according to the changelog (https://github.com/ageitgey/face_recognition/releases)

- Added the face_detection CLI command
- Removed dependencies on scipy to make installation easier
- Cleaned up KNN example and fixed a bug with drawing fonts to label detected faces in the demo

Furthermore the maintainer switched to actual GIT tags for PyPI releases
as discussed in ageitgey/face_recognition#417 and #37566