fixed typo

src/web/html/setup.html

@@ -31,7 +31,7 @@
                         <div class="row mb-3">
                             <div class="col-8 col-sm-3">Dark Mode</div>
                             <div class="col-4 col-sm-9"><input type="checkbox" name="darkMode"/></div>
-                            <div class="col-8 col-sm-3">(empty browser cache or use Shift + F5 after reboot to apply this setting)</div>
+                            <div class="col-8 col-sm-3">(empty browser cache or use CTRL + F5 after reboot to apply this setting)</div>
                         </div>
                     </fieldset>
                     <fieldset class="mb-4">