Update README.md

Author: jamesridgway

README.md

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 Stream Deck control software for software developer's.
 
-[![DevDeck Demo](https://files.james-ridgway.co.uk/images/streamdeck-yt-thumbnail.png)](https://www.youtube.com/watch?v=4ZvrVFW562w)
+[![DevDeck Demo](https://files.jamesridgway.co.uk/images/streamdeck-yt-thumbnail.png)](https://www.youtube.com/watch?v=4ZvrVFW562w)
 
 ## Getting Started