Auto merge of #109911 - JohnTitor:rollup-7gjiqim, r=JohnTitor

Rollup of 6 pull requests

Successful merges:

 - #109783 (Update contributing links for rustc-dev-guide changes)
 - #109883 (Add links to <cell.rs>)
 - #109889 (Update book, rustc-dev-guide, rust-by-example)
 - #109896 (Never consider int and float vars for `FnPtr` candidates)
 - #109902 (Add async-await test for #107414)
 - #109903 (Add Chris Denton to `.mailmap`)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors