Local workspace.dependencies versions are not being masked

[TitanNano]

The version masking of local dependencies is not being applied to local workspace dependencies that are defined in the root Cargo.toml under [workspace.dependencies]. This causes the version resolution to fail in cargo cook

https://github.com/LukeMathWalker/cargo-chef/blob/main/src/skeleton/version_masking.rs#L71
only handles dependencies under target.* and without any prefix. It should be extended by the workspace parent key.