Fix ignore annotation

Author: ricobbe

src/doc/unstable-book/src/language-features/raw-dylib.md

@@ -9,8 +9,7 @@ The tracking issue for this feature is: [#58713]
 The `raw_dylib` feature allows you to link against the implementations of functions in an `extern`
 block without, on Windows, linking against an import library.
 
-<!-- NOTE(ignore) this example is specific to the windows targets and requires an external library -->
-```rust,ignore
+```rust,ignore (partial-example)
 #![feature(raw_dylib)]
 
 #[link(name="library", kind="raw-dylib")]