Update speakers.yaml

spec/23/speakers.yaml

@@ -928,7 +928,7 @@
     Spoluzakladatel [Museverse](https://museverse.xyz/)
   caption: |
     Spoluzakladatel Museverse, The Divergents
-  tracks: [ zaklady, btc ]
+  tracks: [ zaklady, nft ]
   web:
     url: https://museverse.xyz/
   country: cz