add back to previous dir hotkey to readme

Author: jjw24

README.md

@@ -215,17 +215,18 @@ And you can download <a href="https://github.com/Flow-Launcher/Flow.Launcher/dis
 
 | Hotkey                                                       | Description                                  |
 | ------------------------------------------------------------ | -------------------------------------------- |
-| <kbd>Alt</kbd>+ <kbd>Space</kbd>                             | Open Search Box (Default and Configurable)   |
+| <kbd>Alt</kbd>+ <kbd>Space</kbd>                             | Open Search Box (default and configurable)   |
 | <kbd>Enter</kbd>                                             | Execute                                      |
 | <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>Enter</kbd>            | Run As Admin                                 |
 | <kbd>↑</kbd><kbd>↓</kbd>                                     | Scroll up & Down                             |
 | <kbd>←</kbd><kbd>→</kbd>                                     | Back to Result / Open Context Menu           |
-| <kbd>Ctrl</kbd> +<kbd>o</kbd> , <kbd>Shift</kbd> +<kbd>Enter</kbd> | Open Context Menu                            |
-| <kbd>Tab</kbd>                                               | Autocomplete                    |
+| <kbd>Ctrl</kbd> +<kbd>o</kbd> , <kbd>Shift</kbd> +<kbd>Enter</kbd> | Open Context Menu                      |
+| <kbd>Tab</kbd>                                               | Autocomplete                                 |
 | <kbd>Esc</kbd>                                               | Back to Result & Close                       |
 | <kbd>Ctrl</kbd> +<kbd>i</kbd>                                | Open Setting Window                          |
 | <kbd>F5</kbd>                                                | Reload All Plugin Data & Window Search Index |
 | <kbd>Ctrl</kbd> + <kbd>h</kbd>                               | Open Query History                           |
+| <kbd>Ctrl</kbd> + <kbd>Backspace</kbd>                       | Back to previous directory                   |
 
 
 ## System Command List