Add missing features to openbookqa dataset for additional config (#4278)

Remove a copy-paste sentence in dataset cards (#4281)

Fix style in openbookqa dataset (#4270)

Fix bug in choices labels in openbookqa dataset (#4259)

Update files from the datasets library (from 1.18.0)

Update files from the datasets library (from 1.8.0)

Update files from the datasets library (from 1.7.0)

Update files from the datasets library (from 1.6.0)

Update files from the datasets library (from 1.4.0)

Update files from the datasets library (from 1.3.0)

Update files from the datasets library (from 1.0.0)