Update docs (13336)

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

en/device-dev/porting/porting-yangfan-on_standard-demo.md

@@ -1429,7 +1429,7 @@ Now, there are two debugging ideas:
 
    
 
-According to the entire debugging process, the camera supports the YUYV and MJPEG formats. By default, preview in **v4l2_main** uses the YUYV format. Change the format to MJEPG and try again.
+According to the entire debugging process, the camera supports the YUYV and MJPEG formats. By default, preview in **v4l2_main** uses the YUYV format. Change the format to MJPEG and try again.
 
 Modification: