GitLab

* [docs] Add details to docs on improving training speed

* formatting

* fix link

* fix formatting

* replace 'performance' with 'accuracy' and mention learning_rate

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* regenerate docs from config.h
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>