Update README.md

README.md

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 **Demos:** [some functionality (pcb v1.1)](https://youtu.be/KbBgIg76SMw), [morse flasher](https://www.youtube.com/watch?v=6wbYGG_hJaY), [camera #1](https://www.tiktok.com/@erwinried/video/7210890140896595205), [assembly reel](https://www.tiktok.com/@erwinried/video/7209337667656469765), [motion sensor](https://www.tiktok.com/@erwinried/video/7198635018200141061), [camera #2](https://www.tiktok.com/@erwinried/video/7194596683051764998)
 
-**Buy one:** [Tindie Store](https://www.tindie.com/products/29150/)
+**Buy one:** [Tindie Store](https://www.tindie.com/stores/eried/)
 
 **Get started:** [wiki/First-steps](https://github.com/eried/flipperzero-mayhem/wiki/First-steps)