Merge branch 'pr_18845_v6.1' into 'release/v6.1'

fix(openthread): restore ot_network_auto_start() call in ot_br example (IDFGH-17984) (v6.1)

See merge request espressif/esp-idf!52857

examples/openthread/ot_br/main/esp_ot_br.c

@@ -134,4 +134,7 @@ void app_main(void)
     ESP_ERROR_CHECK(esp_coex_wifi_i154_enable());
 #endif
 #endif
+#if CONFIG_OPENTHREAD_NETWORK_AUTO_START
+    ot_network_auto_start();
+#endif
 }