Auto merge of #44004 - frewsxcv:frewsxcv-bors-docs, r=Mark-Simulacrum
Auto merge of #44004 - frewsxcv:frewsxcv-bors-docs, r=Mark-Simulacrum

Fix broken homu link in CONTRIBUTING.md.

Fixes the docs aspect of https://github.com/rust-lang/rust/issues/43898.

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