Fix typo in EditorView documentation

Incorrect usage of `atom.workspace.getEditorViews()` fixed with `atom.workspaceView.getEditorViews()`.

As a side note, this example should ideally be moved to the `Editor` class and changed to

```coffeescript
for editor in atom.workspace.getEditors()
  console.log(editor.getPath())
```

given the nature of the example, lest we change the `console.log` statement to something else that doesn't rely on `Editor` as opposed to `EditorView`.