message: Also mention `build.target` being an array.
diff: flag to `cargo rustc` to override the crate type.
  [#10838](https://github.com/rust-lang/cargo/pull/10838)
  - Cargo commands can now accept multiple `--target` flags to build for
  - multiple targets at once.
  + multiple targets at once, and the
  + [`build.target`](https://doc.rust-lang.org/nightly/cargo/reference/config.html#buildtarget)
  + config option may now take an array of multiple targets.
  [#10766](https://github.com/rust-lang/cargo/pull/10766)
  - The `--jobs` argument can now take a negative number to count backwards from
  the max CPUs.
  