Update login paragraph in crates-io docs.
Update login paragraph in crates-io docs.

rustyhorde/cargo,achanda/cargo,tsurai/cargo,tshepang/cargo,durka/cargo,nipunn1313/cargo,tsurai/cargo,eminence/cargo,eminence/cargo,eminence/cargo,nipunn1313/cargo,nipunn1313/cargo,durka/cargo,vojtechkral/cargo,rust-lang/cargo,eminence/cargo,durka/cargo,tsurai/cargo,durka/cargo,rustyhorde/cargo,tshepang/cargo,vojtechkral/cargo,tsurai/cargo,rustyhorde/cargo,achanda/cargo,tsurai/cargo,rust-lang/cargo,achanda/cargo,tshepang/cargo,rust-lang/cargo,tshepang/cargo,rust-lang/cargo,vojtechkral/cargo,vojtechkral/cargo,achanda/cargo,rustyhorde/cargo,nipunn1313/cargo