[Examples] Correct run ner label2id for fine-tuned models (#15017)
* up
* up
* make style
* apply sylvains suggestions
* apply changes to accelerate as well
* more changes
* Apply suggestions from code review
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>