Link for the OCR-D models is broken

[michalbubula]

In https://ocr-d.de/en/models there is a broken link for the list of the file resources that OCR-D/core is aware of:

https://github.com/OCR-D/core/blob/master/ocrd/ocrd/resource_list.yml

[kba]

Oh, right, the location changed after we moved to a single src dir. Thanks for spotting.