Update supported resitories with new B-centres

[dietervu]

See centre registry or https://www.clarin.eu/content/certified-b-centres for a full list.

Some centres also changed name, eg ASV Leipzig is now ASV/SAW Leipzig

Currently missing:

• Árni Magnússon Institute for Icelandic Studies
• CLARIN Centre of Latvian language resources and tools
• ORTOLANG