does not update the actual package

After updating via `asdf rust install latest`, the actual binaries are not updated, despite showing the new version in the path:

```
λ asdf install rust latest
rust 1.66.1 is already installed

λ asdf global rust "$(asdf latest rust)"

λ which rustc
/Users/jankatins/.asdf/installs/rust/1.66.1/bin/rustc

λ /Users/jankatins/.asdf/installs/rust/1.66.1/bin/rustc --version
rustc 1.64.0 (a55dd71d5 2022-09-19)
```

Reproduce the reported `asdf install rust latest`, `asdf global rust ...`, and direct `rustc --version` commands, then trace the plugin's install and version-selection entry points. Done means the selected installed path's rustc reports the version that asdf says is installed, rather than an older binary.

Written by the indexing model from the issue text.