Add explicit instructions for the dep@vers form
@@ -140,6 +140,9 @@ Remove a dependency from a Cargo.toml manifest file.
Upgrade dependencies in your `Cargo.toml` to their latest versions.
+To specify a version to upgrade to, provide the dependencies in the `<crate name>@<version>` format,
+e.g. `cargo upgrade docopt@~0.9.0 serde@1.0.1`.
+
This command differs from `cargo update`, which updates the dependency versions recorded in the
local lock file (Cargo.lock).
