[Yaml] Feature #48920 Allow milliseconds and microseconds in dates

[fabpot]

Q	A
Feature PR	symfony/symfony#49164
PR author(s)	@dustinwilson
Merged in	6.3

We created this issue to not forget to document this new feature. We would really appreciate if you can help us with this task. If you are not sure how to do it, please ask us and we will help you.

To fix this issue, please create a PR against the 6.3 branch in the symfony-docs repository.

Thank you! 😄

[xabbuh]

I don't think this is something we need to document. People will discover it when working with DateTime objects.