find lossless jxl images and reencode them as lossy

jxl.sh

#!/usr/bin/env bash
set -euo pipefail 

while IFS= read -r -d '' file; do
  if jxlinfo "$file" | grep -iq lossless; then
    echo "Image $file is lossless"
    cjxl --container=1 "$file" "$file"
    echo "Finished conversion"
  fi
done < <(find . -type f -iname "*.jxl" -size +20M -print0)