Unnamed repository; edit this file 'description' to name the repository.
Rollup merge of #138061 - jieyouxu:target-reviewers, r=wesleywiser
triagebot: add a `compiler_leads` ad-hoc group
Intended for e.g. rolling reviewers for [adding new targets](https://forge.rust-lang.org/compiler/proposals-and-stabilization.html#targets).
rust-lang/rust-forge side doc update: https://github.com/rust-lang/rust-forge/pull/815
r? ghost (for testing)
cc ``@davidtwco`` or ``@wesleywiser``
