fix(readme): update dev_env command

Author: starfetch

README.md

@@ -18,7 +18,7 @@ for parametric design of sewing patterns. It's a modular system (check our list
 of [plugins](https://freesewing.dev/reference/plugins) and getting started is as simple as:
 
 ```bash
-npm init freesewing-pattern
+npx create-freesewing-pattern
 ```
 
 The [getting started](https://freesewing.dev/guides/getting-started/) section on [freesewing.dev](https://freesewing.dev/) is a good