Deprecation note and doc(cfg) don't look good in combination

[jplatte]

I think there should be some spacing in between, and the different height is also unfortunate.

I also opened #98341 about the poor contrast of the link, but that's unrelated to doc(cfg).

@rustbot labels: +T-rustdoc +F-doc_cfg +A-rustdoc-ui

[jsha]

Thanks for the report! Also mentioned in #98266.