修改TemplateInstanceItemSaveReqVO类属性val的校验规则为可以为空

zt-module-base/zt-module-base-server/src/main/java/com/zt/plat/module/base/controller/admin/templtp/vo/TemplateInstanceItemSaveReqVO.java

@@ -21,7 +21,7 @@ public class TemplateInstanceItemSaveReqVO {
     private String itmId;
 
     @Schema(description = "用户填写的值", requiredMode = Schema.RequiredMode.REQUIRED)
-    @NotEmpty(message = "用户填写的值不能为空")
+//    @NotEmpty(message = "用户填写的值不能为空")
     private String val;
 
 }