Update

spec/22/speakers.yaml

@@ -427,7 +427,7 @@
 
 - id: ondrej-vostal
   name: Ondřej Vostal
-  bio: Matematin a ekonom
+  bio: Matematik a ekonom
   orgs: |
     Zakladatel [Chainkeepers](https://www.chainkeepers.io/)
   web: