feat(openthread): update openthread ot_br and ot_zb_multipan examples

examples/openthread/ot_br/README.md

@@ -22,7 +22,7 @@ By default, two SoCs are required to run this example:
 * Another IEEE 802.15.4 SoC (ESP32-H2) loaded with [ot_cli](../ot_cli) example.
 
 Connect the two SoCs via UART, below is an example setup with ESP32 DevKitC and ESP32-H2 DevKitC:
-![thread_br](image/thread-border-router-esp32-esp32h2.jpg)
+![thread_br](image/thread-border-router-esp32-esp32h2.webp)
 
 ESP32 pin | ESP32-H2 pin
 ----------|-------------

examples/openthread/ot_zb_multipan/README.md

@@ -67,7 +67,7 @@ On boot you should see, in order:
 
 ## Testing Zigbee Join
 
-Flash another ESP32 (capable of 802.15.4) with `examples/zigbee/light_sample/HA_on_off_light`. After this host forms the Zigbee network and opens the network for 180 s, the light sample should join automatically.
+Flash another ESP32 (capable of 802.15.4) with `examples/zigbee/light_sample/HA_on_off_switch`. After this host forms the Zigbee network and opens the network for 180 s, the Zigbee On/Off switch sample should join automatically.
 
 Then bring up Wi-Fi and Thread the usual way: