chore: minimum the code change

Author: wendajiang

src/book/mod.rs

@@ -281,7 +281,7 @@ impl MDBook {
                 };
 
                 if let Some(chapter) = chapter {
-                    if ch.name != *chapter && chapter_path.to_str() != Some(chapter) {
+                    if ch.name != chapter && chapter_path.to_str() != Some(chapter) {
                         if chapter == "?" {
                             info!("Skipping chapter '{}'...", ch.name);
                         }