Rollup merge of #70567 - JOE1994:patch-3, r=Centril
Rollup merge of #70567 - JOE1994:patch-3, r=Centril

Fix broken link in README

Fix broken link to `rustc-dev-guide` section for `codegen`

graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust