fix: no project-name in argument of dx create

[tkr-sh]

The CLI tool dx doesn't have an argument project-name

$ dx create --help
Init a new project for Dioxus

Usage: dx create [OPTIONS]

Options:
      --template <TEMPLATE>  Template path [default: gh:dioxuslabs/dioxus-template]
      --bin <BIN>            Specify bin target
  -h, --help                 Print help

$ dx create my-project
error: unexpected argument 'my-project' found

Usage: dx create [OPTIONS]

For more information, try '--help'.

[ealmloff]

Thank you!