Sorting based on strings rather than number

[azibit]

https://github.com/johnsk95/PT4AL/blob/9a0da4af383fd66be2df0ee8a6feb233009c17d5/make_batches.py#L87

I believe this line would return the loss as a String such that the sorting is now done based on strings rather than as numbers.

It is worth checking out since sorting based on Strings can be different from sorting based on numbers