update api

examcloud-core-oe-student-api-provider/src/main/java/cn/com/qmth/examcloud/core/oe/student/api/controller/client/ExamProcessController.java

@@ -206,8 +206,8 @@ public class ExamProcessController extends ControllerSupport {
 
     // @Naked
     @ApiOperation(value = "文件上传签名信息")
-    @GetMapping("/upload/sign")
-    public GetYunSignDomain getUploadSign(GetYunSignDomainQuery query) {
+    @PostMapping("/upload/sign")
+    public GetYunSignDomain getUploadSign(@RequestBody GetYunSignDomainQuery query) {
         User accessUser = this.getAccessUser();
 
         if (StringUtils.isBlank(query.getFileSuffix())) {