Fix link in USBHID.md

Remove duplication, so link works.

Author: Amanda Butler

docs/api/usb/USBHID.md

@@ -18,7 +18,7 @@ You can use the USBHID class to turn an Mbed board into an HID (Human Interface
 
 To use this script, first flash the Mbed board with the code above. Connect the target's USB to the host computer. Then run this script. The script will send 8 bytes of data (1 2 3 4 5 6 7 8) to the Mbed board and will read and print the data sent to the host computer by the Mbed board.   
 
-[![View code](https://www.mbed.com/embed/?url=https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/APIs_USB/USBHID)](https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/APIs_USB/APIs_USB/USBHID/USBHID.py)
+[![View code](https://www.mbed.com/embed/?url=https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/APIs_USB/USBHID)](https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/APIs_USB/USBHID/USBHID.py)
 
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