`berks install --path [PATH}` has been replaced by `berks vendor`

Berkshelf switched commands from `berks install --path [PATH}` to `berks vendor`.
```
INFO: Installing cookbook dependencies with Berkshelf resolver
DEPRECATED: `berks install --path [PATH}` has been replaced by `berks vendor`.
DEPRECATED: Re-run your command as `berks vendor [PATH]` or see `berks help vendor`.
```