cargo-workspace plugin can't handle `version.workspace`

[mrcjkb]

Environment details

• OS: Ubuntu 22.04.3 (release-please GitHub Action)
• release-please version: Using google-github-actions/release-please-action@v3

Steps to reproduce

Use release-please on a Rust project with

• A Cargo.toml at the root, and
  • A sub-crate with a Cargo.toml whose version points to the version specified in workspace.package

# root Cargo.toml
members = [
  "subcrate",
]

[workspace.package]
version = "<version>"

#subcrate/Cargo.toml
[package]
name = "subcrate"
version.workspace = true

And release-please configured accordingly, e.g.

• .release-please-manifest.json:

{
    ".": "<version>",
    "subcrate": "<version>"
}

• release-please-config.json:

{
  "plugins": ["cargo-workspace"],
  "packages": {
    ".": {
        "release-type": "rust"
    },
    "subcrate": {
        "release-type": "rust"
    }
  }
}

See for example this project (permalink), or this example from the cargo book.

Expected behaviour

release-please updates the workspace.package.version in the root Cargo.toml

Actual behaviour

release-please fails with

cargo-workspace (mrcjkb/tuxedo-rs): package manifest at subcrate/Cargo.toml has an invalid [package.version]

[c-thiel]

@mrcjkb and anyone else stumbling over this, the next best thing I could do is at least link the versions as describe here: https://github.com/googleapis/release-please/blob/main/docs/manifest-releaser.md#linked-versions

While this results in 3 Changelogs, at least we get one PR for all crates and simultaneous version upgrades. It looks something like this now: https://github.com/hansetag/iceberg-catalog/blob/9b9cb2257cd1294086ab3cd5b0a82a5cdda78748/release-please/release-please-config.json