chore: change OpenCV dependency

We're not using imshow function, so we can use the headless version of
OpenCV, which is lighter.
See https://pypi.org/project/opencv-python/ for more information.

pyproject.toml

@@ -72,7 +72,7 @@ python-redis-lock = "~4.0.0"
 transformers = ">=4.30.2,<4.39.0"
 lark = "~1.1.4"
 h5py = "~3.8.0"
-opencv-contrib-python = "~4.7.0.72"
+opencv-contrib-python-headless = "~4.10.0.84"
 toml = "~0.10.2"
 openfoodfacts = "0.1.11"
 imagehash = "~4.3.1"