Final state of scoreboard (#647)

<!-- Solution for PR template choice:
https://stackoverflow.com/a/75030350/24543008 -->

Please go to the `Preview` tab and select the appropriate template:

* [Submit Student task
(English)](?expand=1&template=task_submission_en.md)
* [Submit Student task
(Russian)](?expand=1&template=task_submission_ru.md)

[CI] Add missing error message for clang-tidy workflow (#330)

Update README.md