Rollup merge of #31969 - brson:relnotes, r=alexcrichton
Rollup merge of #31969 - brson:relnotes, r=alexcrichton

Same as https://github.com/rust-lang/rust/pull/31923 but without the submodule updates.

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