message: Fix cosmwasm-schema's repo link
diff: @@ -4,7 +4,7 @@ version = "0.8.0-alpha1"
  authors = ["Simon Warta <webmaster128@users.noreply.github.com>", "Ethan Frey <ethanfrey@users.noreply.github.com>"]
  edition = "2018"
  description = "A dev-dependency for CosmWasm contracts to generate JSON Schema files."
  -repository = "https://github.com/CosmWasm/cosmwasm/tree/master/packages/vm"
  +repository = "https://github.com/CosmWasm/cosmwasm/tree/master/packages/schema"
  license = "Apache-2.0"
  [badges]
  