Make rust-docs component optional for local testing.
Make rust-docs component optional for local testing.

rustyhorde/cargo,eminence/cargo,rust-lang/cargo,tshepang/cargo,rustyhorde/cargo,nipunn1313/cargo,rust-lang/cargo,eminence/cargo,eminence/cargo,nipunn1313/cargo,tsurai/cargo,rust-lang/cargo,tshepang/cargo,rust-lang/cargo,tsurai/cargo,tshepang/cargo,tsurai/cargo,tshepang/cargo,eminence/cargo,tsurai/cargo,nipunn1313/cargo,tsurai/cargo,nipunn1313/cargo,rustyhorde/cargo,rustyhorde/cargo