Plugin Echo example: Wrong npm keyword `echosystem:cordova`

I read the plugin documentation for [Create a plugin](https://cordova.apache.org/docs/en/latest/guide/hybrid/plugins/index.html) and noticed, that maybe an npm keyword example could be wrong:

```bash
npm pkg set "keywords[]=echosystem:cordova"
```

Here the keyword `echosystem:cordova` should be added. Should this be really `echosystem` or more `ecosystem`?