[fix(download_stacked_image_and_mask): Set proper shape for stacked image.](https://github.com/mozilla-ai/osm-ai-helper/commit/ea0b9547af2840556b6714c27b38e325ee485c43)
Was using cols (bootm, top) to set the first array dimension which actually correspond to rows.
This was not causing issues when the bbox was a perfect square.
However, in some cases the `lat_lon_to_col_row` conversion could result in a rectangular shape.
This was causing the `ValueError: could not broadcast input array from shape (512,512,3) into shape (512,0,3)` error.
**Full Changelog**: https://github.com/mozilla-ai/osm-ai-helper/compare/1.4.0...1.4.1