update dataset record

[VladimirAlexiev]

@davidlamprecht @michaelfaerber: Thanks for this amazing resource!
We at Ontotext are actively using it for SOTA research in various areas, eg see these queries:

• NER/NEL datasets: https://api.triplydb.com/s/UOb7b6kN-
• Question Answering tasks: https://api.triplydb.com/s/G4vopX7zP
• Question Answering datasets: https://api.triplydb.com/s/Hedg3bt1y

I've made a dataset record: https://paperswithcode.com/dataset/linkedpaperswithcode.
Please take a look and update it if needed.
(I wanted to introduce a new "modality" Science KGs but I cannot add a new one).

Thanks again!