Fix broken link

Author: louisdorard

README.md

@@ -18,7 +18,7 @@ Quick Links:
   * For Developers:
     * [Introduction to Visual Edit's CRUD Python API](docs/CRUD_example_usage.ipynb)
     * [Low-code webapp customizations with Dash](https://dataiku.github.io/dss-visual-edit/dash-examples)
-    * [Reference API documentation]([backend/](https://dataiku.github.io/dss-visual-edit/backend/#DataEditor))
+    * [Reference API documentation](https://dataiku.github.io/dss-visual-edit/backend/#DataEditor)
   * [FAQ](faq)
 * For Business Users:
   * [How to use the data table](https://dataiku.github.io/dss-visual-edit/data-table-features)