HeadsetAutoSleep: restore 'minutes' in description

Prior empirical testing confirmed byte[0] (the user-facing slot) is in
minutes; only the other two slots (preserved via RMW) have uncertain units.

lib/logitech_receiver/settings_templates.py

@@ -1793,7 +1793,7 @@ class _AutoSleepRangeValidator(settings_validator.RangeValidator):
 class HeadsetAutoSleep(settings.Setting):
     name = "headset-auto-sleep"
     label = _("Auto Sleep Timeout")
-    description = _("Headset idle-timer slot (0 = disabled). Units are device-specific.")
+    description = _("Idle time in minutes before the headset enters sleep mode (0 = disabled).")
     feature = _F.CENTURION_AUTO_SLEEP
     rw_options = {"read_fnid": 0x00, "write_fnid": 0x10}
     validator_class = _AutoSleepRangeValidator