Hi !
While working on a PR I did some research on layout details and realized that thecaution orwarning admonitions are rendered the same way in Symfony Doc. SeeDoctrine (this is warning) andLock (this is caution) as exemples

I also found#19181 about about a previous work oncaution anddanger and IMO there is no particular need to introduce more granularity in the admonitions that are available by differentiatingcaution andwarning
So I propose to remove one of the two syntaxes, maybewarning because it's the least used in the documentation

It's probably not a very important topic but looks good one to make documentation writing simpler and more understandable