Skip starlark bin from cargo doc to fix Windows CI

Summary: The `starlark` bin in `starlark_bin` shares a name with the `starlark` lib, so `cargo doc` writes both into `target/doc/starlark/`. On Windows this races and rustdoc fails with "path not found" for nested files ([cargo#6313](rust-lang/cargo#6313)). Setting `doc = false` on the bin makes rustdoc skip it.

Reviewed By: IanChilds

Differential Revision: D102728173

fbshipit-source-id: fdc409dcaf3dca81f5a58f0a9e44594d3fa3c741

Author: Nero5023

starlark_bin/Cargo.toml

@@ -34,5 +34,6 @@ thiserror = "2.0.18"
 walkdir = "2.3"
 
 [[bin]]
+doc = false
 name = "starlark"
 path = "bin/main.rs"