remove link to uhex spec as it 404s

Author: microbit-mark

latest-revision/latest-revision-accessories.md

@@ -119,7 +119,7 @@ The latest board revision introduces a superset of the Intel-Hex format that ena
 A **Universal Hex** hex file will work on a v1 or V2 board.
 A clear indication that you are working with this format is that a compiled .hex file will be ~1.8Mb as opposed to ~700Kb in size.
 
-A [Universal Hex JavaScript Library](https://github.com/microbit-foundation/microbit-universal-hex) has been written to implement the format and associated detailed [specification of the Universal Hex format](https://github.com/microbit-foundation/universal-hex/).  Please [get in contact](mailto:[email protected]?subject=Request%20for%20access%20to%20Universal%20hex&20spec&body=Name%3A%0D%0A%0D%0AGitHub%20ID%3A) if you require access to the specification.
+A [Universal Hex JavaScript Library](https://github.com/microbit-foundation/microbit-universal-hex) has been written to implement the format and associated detailed specification of the Universal Hex format. Please [get in contact](mailto:[email protected]?subject=Request%20for%20access%20to%20Universal%20hex&20spec&body=Name%3A%0D%0A%0D%0AGitHub%20ID%3A) if you require access to the specification.
 
 ### Hex format compatibility