sync ethprague: countries (2)

data/23/events/ethprague/data.json

@@ -332,6 +332,7 @@
       "twitter": "AnettRolikova",
       "caption": "Hyperlane",
       "photoUrl": "https://images.ctfassets.net/6j1me6tz5h39/33xR2IBQfcwgfuov597SKQ/85b2693d65825ee0a7c1fceb3a478191/twheadshot_ZgkfQh1.jpeg",
+      "country": "sk",
       "photo": "photos/speakers/anett-rolikova.jpeg"
     },
     {