Merge branch 'fixbug/fixbook' into 'master'

bug: [none] 0311接口优化

See merge request rays/pcloud-book!1519

pcloud-service-book/src/main/java/com/pcloud/book/book/biz/impl/BookBizImpl.java

@@ -4678,6 +4678,6 @@ public class BookBizImpl implements BookBiz {
                 bookCache.setBookInfoToRedis(bookDto);
             }
         }
-        return null;
+        return bookDto;
     }
 }