i suggest you follow the author's twitter.
Whenever he finished the work, he will post a tweet for it.
ちき
2021-10-19 09:54:37 +0000 UTC
just noticed the update, but the text for posting 2 more is still there, so we will get 5 in total? :P
also i if you add something like this the update is about 2 weeks later? cause i literally checked this (and previous posts) daily for updates since it doesnt appear in the notifications if you edit it. Or maybe you can post future updates as new Post (and delete the old one) so everyone can get notified?