updated keyboard shortcut in the documentation

README.MD

@@ -44,7 +44,7 @@ SingleFile can be installed on:
  - With auto-save active, pages are automatically saved every time after being loaded (or before being unloaded if not).
  - Right-click on the SingleFile button and select "Options"/"Manage extension" to open the options page.
  - The default save folder is the download folder configured in your browser, cf. about:preferences in Firefox and chrome://settings in Chrome.
- - You can use the shortcut Ctrl+Shift+X to save current or selected tabs in Chrome. Go to chrome://extensions/shortcuts to change it.
+ - You can use the shortcut Ctrl+Shift+Y to save current or selected tabs in Chrome. Go to chrome://extensions/shortcuts to change it.
 
 ## More info
 See the extension help in the options page for more detailed information about the options and technical notes.

extension/ui/pages/help.html

@@ -74,7 +74,7 @@
 						The default save folder is the download folder configured in your browser, cf. about:preferences in Firefox and
 						chrome://settings in Chrome.
 					</li>
-					<li>You can use the shortcut Ctrl+Shift+X to save current or selected tabs in Chrome. Go to
+					<li>You can use the shortcut Ctrl+Shift+Y to save current or selected tabs in Chrome. Go to
 						<a href="chrome://extensions/shortcuts">chrome://extensions/shortcuts</a> to change it.</li>
 				</ul>
 			</li>