Guidelines don't mention "non-normative" sections

[caugner]

What would you like to see added to BCD?

The guidelines should mention that behaviors mentioned in non-normative section generally don't qualify for inclusion in BCD.

Given that there seem to be exceptions (e.g. date picker UI showing min/max constraints), it would be nice to mention that these can added as non-standard features.

How impactful do you think this enhancement will be?

Make it easier to triage/handle requests like https://github.com/mdn/browser-compat-data/issues/28397.

Do you have anything more you want to share?

No response