message: ledger: update providers docs
diff: @@ -41,14 +41,14 @@ These previews are mostly embeds or images, depending on service type.
  ```js
  import fetchPage from '../fetchPage.js';
  ```
  - * To properly work with the document you just loaded, you can import the `domify` module and use it like this:
  + * To properly work with the document you just loaded, you can import the `secureDomify` module and use it like this:
  ```js
  - import domify from 'domify';
  + import * as secureDomify from '../secureDomify';
  // data is the fetchPage response
  - const el = domify(data.currentTarget.response);
  - const thumbnail = el.querySelector('[property="twitter:image"]').content;
  - const embedURL = el.querySelector('[property="twitter:player"]').content;
  + const el = secureDomify.parse(data.currentTarget.response);
  + const thumbnail = secureDomify.getAttributeFromNode('[property="twitter:image"]', el, 'content');
  + const embedURL = secureDomify.getAttributeFromNode('[property="twitter:player"]', el, 'content');
  ```
  * Import your provider into [src/js/util/providers/index.js](https://github.com/eramdam/BetterTweetDeck/blob/master/src/js/util/providers/index.js):
  ```js
  