update doc

Signed-off-by: Nesterzhou <ester.zhou@huawei.com>

en/application-dev/reference/arkui-ts/ts-basic-components-datepicker.md

 # DatePicker
 
 
-> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE：**
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
 > This component is supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.
 
 
@@ -41,15 +41,15 @@ Creates a date picker that allows users to select a date or time within the spec
 
 ## Attributes
 
-  | Name | Type | Default Value | Description | 
+| Name | Type | Default Value | Description |
 | -------- | -------- | -------- |-------- |
 | lunar | boolean | false | Whether&nbsp;to&nbsp;display&nbsp;the&nbsp;lunar&nbsp;calendar.<br/>-&nbsp;**true**:&nbsp;The&nbsp;lunar&nbsp;calendar&nbsp;is&nbsp;displayed.<br/>-&nbsp;**false**:&nbsp;The&nbsp;lunar&nbsp;calendar&nbsp;is&nbsp;not&nbsp;displayed. |
-| useMilitaryTime | boolean | false | Whether&nbsp;the&nbsp;display&nbsp;time&nbsp;is&nbsp;in&nbsp;24-hour&nbsp;format. | 
+| useMilitaryTime | boolean | false | Whether&nbsp;the&nbsp;display&nbsp;time&nbsp;is&nbsp;in&nbsp;24-hour&nbsp;format. The value cannot be dynamically modified. |
 
 
 ## Events
 
-  | Name | Description | 
+| Name | Description |
 | -------- | -------- |
 | onChange(callback:&nbsp;(value:&nbsp;DatePickerResult)&nbsp;=&gt;&nbsp;void) | This&nbsp;event&nbsp;is&nbsp;triggered&nbsp;when&nbsp;a&nbsp;date&nbsp;or&nbsp;time&nbsp;is&nbsp;selected. |