Update fast new tab shortcut in gh-pages/index.html

This is a trivial companion PR to @jcheng31's likewise trivial PR #98.

Author: sopel

index.html

@@ -90,7 +90,7 @@ <h4>Tab manipulation</h4>
                         <li><code>Win + Alt + P</code> : Preferences (Or right click on title bar)</li>
                         <li><code>Ctrl + t</code> : New tab dialog (maybe you want to open cmd as admin?)</li>
                         <li><code>Ctrl + w</code> : Close tab</li>
-                        <li><code>Ctrl + alt + number</code> : Fast new tab:
+                        <li><code>Shift + alt + number</code> : Fast new tab:
                             <ol>
                                 <li><code>1.</code> CMD</li>
                                 <li><code>2.</code> PowerShell</li>