docs: Fix link to example
@@ -308,7 +308,7 @@ $ 03_04_subcommands_derive add bob
Above, we used a struct-variant to define the `add` subcommand. Alternatively,
you can
-[use a struct for your subcommand's arguments](03_04_subcommands_alt_derive.rs).
+[use a struct for your subcommand's arguments](03_04_subcommands_alt.rs).
Because we used `command: Commands` instead of `command: Option<Commands>`:
```console
