fix build.so link

data/23/events/build-so-demo-day/index.toml

@@ -38,12 +38,12 @@ Join the BuidlersTribe Prague Chapter here to meet local founders and have a Pra
 '''
 
 [links]
-web = "https://buidl.so/buidlso-demo-day-eth-prague"
+web = "https://buidl.so/buidlso-demo-day-prague"
 telegram = "https://t.me/+-w9OjVyy88IzYzll"
 twitter = "https://twitter.com/BuidlersTribe"
 
 [registration]
 type = "signup"
-link = "https://buidl.so/buidlso-demo-day-eth-prague"
+link = "https://buidl.so/buidlso-demo-day-prague"
 status = "available"
 button = "Register for free!"