Add hybridSwitchBufferTime to settings example

Author: robertbryer

src/core/Settings.js

@@ -238,6 +238,7 @@ import SwitchRequest from '../streaming/rules/SwitchRequest.js';
  *             abr: {
  *                 limitBitrateByPortal: false,
  *                 usePixelRatioInLimitBitrateByPortal: false,
+ *                 hybridSwitchBufferTime: 12,
  *                rules: {
  *                     throughputRule: {
  *                         active: true