Upload location documentation missing

[rossriley]

We seem to have lost the documentation for the upload parameter on image fields:

https://docs.bolt.cm/3.2/fields/image https://docs.bolt.cm/3.2/fields/imagelist https://docs.bolt.cm/3.2/fields/file https://docs.bolt.cm/3.2/fields/filelist

It's documented now only in the cheatsheet.

[rossriley]

@PhillippOhlandt you're taking your time on this one ;-)

[PhillippOhlandt]

@rossriley Still working hard on it :D