Use Bayesian average for scores

[Atulin]

Using plain average score for stories isn't great. Is a story with a single upvote really better than that with 99 upvotes and a single downvote?

Ogma doesn't use upvotes/downvotes nor any 0-5 star system, but on the off chance we want to change that, Bayesian average will be of help: https://www.algolia.com/doc/guides/managing-results/must-do/custom-ranking/how-to/bayesian-average/#the-difficulties-with-calculating-a-reliable-rating