'Embedded book' link seems to be outdated at /learn page

[ancane]

What needs to be fixed?

Knowing little about available embedded book options, I found myself at
https://doc.rust-lang.org/stable/embedded-book/ by following yellow 'Embedded Book' button/link from https://rust-lang.org/learn/.
It turned out to be an oldest STM F3 book out of 3 available, which is unfortunate.

Page(s) Affected

https://rust-lang.org/learn/
Yellow 'Embedded Book' link.

Suggested Improvement

I suggest changing that link to https://docs.rust-embedded.org/discovery/ or any other link, pointing to all the available material.
Cheers.