cargo fmt doesn't work on cached run

[BrynCooke]

When using rust the tools installed with the profile are not cached

[tools]
rust = {version = "1.91.1", profile = "default"}

1st run cargo fmt works as rust is installed from scratch

2nd run cargo fmt fails:

cargo fmt --all -- --check
error: 'cargo-fmt' is not installed for the toolchain '1.91.1-x86_64-unknown-linux-gnu'.

I guess that the caching feature is unaware of what got installed with rust.

[risu729]

I think so, see #215