Update README.md

README.md

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 **Video with some functionality** (previous v1.1 hardware): [https://youtu.be/KbBgIg76SMw](https://youtu.be/KbBgIg76SMw)
 
 
-**Buy one:** [Tindie Store](https://www.tindie.com/products/eried/flipper-zero-mayhem-hat-esp32btcamerasdnrf24/)
+**Buy one:** [Tindie Store](https://www.tindie.com/products/29150/)
 
 **Get started:** [wiki/First-steps](https://github.com/eried/flipperzero-mayhem/wiki/First-steps)