fix response `content-type` is not set if access without access token

Kairlec

2023-05-15 ca103731c721aae3f5f622e58c679ed5c09fd9e9

 src/main/java/com/genersoft/iot/vmp/vmanager/gb28181/MobilePosition/MobilePositionController.java

@@ -30,7 +30,7 @@
 *  位置信息管理
 */
@Tag(name  = "位置信息管理")
@CrossOrigin

@RestController
@RequestMapping("/api/position")
public class MobilePositionController {