It currently contains whoever was first to write some code for the crate,
even if many more people have contributed to it later.
The field is "sort of" deprecated, it was made optional recently:
https://rust-lang.github.io/rfcs/3052-optional-authors-field.html
Due the the reasons listed there I believe removing it is better than
setting it to generic fluff like "The Embassy contributors".
Done for /embassy-stm32 only
The new generator is in /stm32-gen-features
/stm32-metapac could/should be added too
A CI check "generated features up to date" could/should be performed
