This question already has an answer here:
tldr; Don't bump minor edits for old posts.
While we can all agree that if you notice questoin in a post, it should be corrected to question, I think we can all also agree that correction shouldn't bump the post back to the active list.
If the edit is less than 30 characters, is over 1 year old, and was not from the owner of the post, then we shouldn't be bumping those posts. Most editors will not change a post by more than 30 characters when going through doing "maintenance".
Not only is their work hampered by the fact that they accidentally bump every post they fix, browsing user time is wasted reviewing an "active" post which went from questoins to questions and was asked 3 years ago.
Limiting the active bump to old posts which were edited by non OP users containing changes with less than 30 characters of difference will
- allow editors to mass edit small changes with ease
- increase the overall grammar and spelling of the exchange
- save user time from reviewing non active posts
- incentivize users to review posts that are turning a year old to fix spelling and grammar