fix: 添加出生日期字段

wfc-modules/wfc-system/src/main/java/org/wfc/system/domain/UUser.java

@@ -62,6 +62,9 @@ public class UUser {
     @Schema(description = "年龄")
     private Integer age;
 
+    @Schema(description = "出生日期")
+    private Date birthDate;
+
     @Schema(description = "地址")
     private String address;