Fix missing tags in dataset cards
_The documentation is not available anymore as the PR was closed or merged._
Fix missing tags in dataset cards:
- boolq
- break_data
- definite_pronoun_resolution
- emo
- kor_nli
- pg19
- quartz
- sciq
- squad_es
- wmt14
- wmt15
- wmt16
- wmt17
- wmt18
- wmt19
- wmt_t2t

This PR partially fixes the missing tags in dataset cards. Subsequent PRs will follow to complete this task.