Update description in the README

Author: krassowski

README.md

@@ -28,9 +28,9 @@ over the underlined code to see a more detailed message
 
 ![inspections](https://raw.githubusercontent.com/jupyter-lsp/jupyterlab-lsp/master/examples/screenshots/inspections.png)
 
-### Jump to Definition
+### Jump to Definition and References
 
-Use the context menu entry, or <kbd>Alt</kbd> + :computer_mouse: to jump to definitions (you can change it to <kbd>Ctrl</kbd>/<kbd>⌘</kbd> in settings); use <kbd>Alt</kbd> + <kbd>o</kbd> to jump back
+Use the context menu entry, or <kbd>Alt</kbd> + :computer_mouse: to jump to definitions/references (you can change it to <kbd>Ctrl</kbd>/<kbd>⌘</kbd> in settings); use <kbd>Alt</kbd> + <kbd>o</kbd> to jump back.
 
 ![jump](https://raw.githubusercontent.com/jupyter-lsp/jupyterlab-lsp/master/examples/screenshots/jump_to_definition.png)