Center caption in Quarto

Is there an easy way to center a caption in Quarto? I work with the revealjs format. I'd like to do this locally.

I've tried with fig-cap-location="center" but it does not work.

Reproducible example:

---
title: "Untitled"
format: revealjs
---

## Centering the caption

![I want this to be centered](https://www.r-project.org/logo/Rlogo.png){fit-align="center"}

I think the easiest way is using css, e.g.

.caption{
   text-align: center;
}