XML encoding should be utf-8 not utf8

[kba]

... and should use OCR-D's generateDS PAGE API consistently

@M3ssman Can you try with this, should fix #196

[M3ssman]

@kba What are the system requirements like? I got this from a colleague && needed to switch machines to recent Ubuntu 24 LTS. README says Python 3.8?

Nonetheless, your change looks very reasonable.
I don't expect anything weird from merging this, so feel free to do so.
(And in the meantime I can re-animate our setup.)

[kba]

What are the system requirements like?

@vahidrezanezhad Maybe we can outline the current requirements in our next meeting? You probably know them best.

I got this from a colleague && needed to switch machines to recent Ubuntu 24 LTS.

What kind of error messages did you get, how did you install and in what environment (OS version, python deployment, GPU/CPU etc.)? Feel free to open an issue for that.