Minor updates (2)

spec/23/speakers.yaml

@@ -329,6 +329,7 @@
     Partner Engineer @ [Fractal.is](https://www.fractal.is/), Software & Blockchain Developer, Lecturer @ [Ackee Blockchain](https://ackeeblockchain.com/)
   caption: Developer, Smart-contract Auditor
   tracks: [ eth, alty, nft ]
+  country: cz
   desc: |
     Full-stack software engineer with eight years of experience, Solana blockchain auditor.