Document translation example in README wrong

[JanEbbing]

The document translation example in the README is currently wrong, the order of arguments is different and a filename needs to be supplied

Wrong:

DeepL.document.translate_document('/path/to/spanish_document.pdf', 'ES', 'EN', '/path/to/translated_document.pdf')

Correct:

DeepL.document.translate_document('/path/to/spanish_document.pdf', '/path/to/translated_document.pdf', 'ES', 'EN', 'spanish_document.pdf')

I am keeping this issue to track this for now, I already have a fix that fixes the README and makes the filename argument optional.

[JanEbbing]

Fixed in 3.0.1