Improve grammar

The user might not have used a supported program

wiki/src/install/inc/steps/pc_boot_menu.inline.html

@@ -186,7 +186,7 @@ able to use Tails on this computer. Feel free to
   <li><p>What exactly happens when trying to start? Report the complete error
       message that appears on the screen, if any.</p></li>
 
-  <li><p>Which program did you use to install your USB stick?</p></li>
+  <li><p>What program did you use to install your USB stick?</p></li>
 
   <li><p>Have you been able to successfully start another version of Tails
       on this computer before? If so, which version?</p></li>