code_style: correct the comment of invisible commit button

Author: love-linger

src/Views/WorkingCopy.axaml

@@ -246,7 +246,7 @@
           </ToolTip.Tip>
         </Button>
 
-        <!-- Invisible button just to add another hotkey `Ctrl+Alt+Enter` to commit with auto-stage -->
+        <!-- Invisible button just to add another hotkey `Alt+Enter/⌥+Enter` to commit with auto-stage -->
         <Button Grid.Column="7"
                 Width="0" Height="0"
                 Background="Transparent"