Context: About 300 redirects were created on zh_yuewiki while the default redirect magic word was changed due to T296188. Now that the change has been reverted and all the redirects are fixed, zh_yuewiki is now left with around 300 less articles than it used to have before the change went live in June plus the new articles created during the period.
initSiteStats.php --update is automatically being executed every two weeks for all wikis. I don't really think a manual run is necessary here, but it also doesn't hurt.
(I hope I interpreted the intention of the task correctly here)