fix readme update coralnet to sandynet-1
@@ -45,7 +45,7 @@ many custom contracts.
If you don't know what CosmWasm is, please check out
[our homepage](https://cosmwasm.com) and
[our documentation](https://docs.cosmwasm.com) to get more background.
-We are running a [public testnet](https://github.com/CosmWasm/testnets/blob/master/coralnet/README.md)
+We are running a [public testnet](https://github.com/CosmWasm/testnets/blob/master/sandynet-1/README.md)
you can use to test out any contracts.
**Warning** None of these contracts have been audited and no liability is
