Update ChangeLog

Author: vmcj

ChangeLog

@@ -34,7 +34,6 @@ Version 8.3.0DEV
    advice to start a rejudging, similar for updating the scoreboard cache.
  - For interactive problems: add explicit statement to when one of sides of the interactions ran closed their output.
  - Allow importing a (generic) contest warning which is displayed on the scoreboard.
- - [UI] Use entity badges on submission pages.
  - Added option in the dj_setup_database to make dumps, we advice to use those
    before the next phase of a contest like setup of teams, before problem
    imports, before upgrades.