message: optimize cargo path
diff: @@ -19,7 +19,7 @@ ink_env = { version = "3.0.0-rc3", path = "../env", default-features = false }
  ink_storage = { version = "3.0.0-rc3", path = "../storage", default-features = false }
  ink_primitives = { version = "3.0.0-rc3", path = "../primitives", default-features = false }
  ink_metadata = { version = "3.0.0-rc3", path = "../metadata", default-features = false, optional = true }
  -ink_prelude = { version = "3.0.0-rc3", path = "../prelude/", default-features = false }
  +ink_prelude = { version = "3.0.0-rc3", path = "../prelude", default-features = false }
  ink_lang_macro = { version = "3.0.0-rc3", path = "macro", default-features = false }
  scale = { package = "parity-scale-codec", version = "2.1", default-features = false, features = ["derive", "full"] }
  