Merge branch 'jc/relnotes-2.55-rust-fix' into next

A description in the release notes for Git 2.55.0 has been retroactively updated to clarify that Rust support is enabled by default, but still optional, and will become mandatory in Git 3.0. * jc/relnotes-2.55-rust-fix: Rust: fix description in Release Notes to 2.55