improve network time documentation

static/features.html

@@ -953,6 +953,10 @@
                         <li>Screenshot shutter sound is toggleable using the "Touch sounds" option in Settings ➔
                         Sound &amp; vibration while still following the standard method of putting the device
                         on vibration/silent mode to turn off the screenshot shutter sound.</li>
+                        <li>More precise system clock via lowering the system clock time update
+                        threshold from 2000ms to 50ms and lowering the system clock drift warning
+                        from 2000ms to 250ms. This can be helpful for time-based protocols such as
+                        TOTP.</li>
                     </ul>
                 </section>
             </section>