fix(qobuz): correct stale doctest import path in performers

The doc example still imported crate::api::performers from the pre-extraction
src-tauri layout; the doctest never compiled in the extracted crate.

cc

crates/qbz-qobuz/src/performers.rs

@@ -27,7 +27,7 @@ impl Performer {
 /// # Examples
 ///
 /// ```
-/// use crate::api::performers::parse_performers;
+/// use qbz_qobuz::performers::parse_performers;
 ///
 /// let performers = parse_performers("John Coltrane, Saxophone, MainArtist - McCoy Tyner, Piano");
 /// assert_eq!(performers.len(), 2);