update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/device-dev/driver/driver-platform-gpio-des.md

@@ -260,7 +260,7 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
   ```
 
 
-## Development Example
+## Example
 
 The procedure is as follows:
 

en/device-dev/driver/driver-platform-gpio-develop.md

@@ -63,7 +63,7 @@ The GPIO module adaptation involves the following steps:
    - Initialize **GpioCntlr**.
    - Instantiate **GpioMethod** in the **GpioCntlr** object.
      
-      > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**<br/> For details about the callbacks in **GpioMethod**, see [Available APIs](#available_apis).
+      > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**<br/> For details about the callbacks in **GpioMethod**, see [Available APIs](#available-apis).
    
 4. Debug the driver.
    

en/device-dev/driver/driver-platform-hdmi-des.md

@@ -467,7 +467,7 @@ The following is an example of closing an HDMI controller:
 HdmiClose(hdmiHandle);
 ```
 
-### Development Example
+### Example
 
 This following example shows how to use HDMI APIs to manage an HDMI device on a Hi3516D V300 development board.