Merge branch 'feature/github-7661' into 'master'

mck pin not defined in i2s examples

Closes IDFGH-5973 and IDFGH-5974

See merge request espressif/esp-idf!15452

examples/peripherals/i2s/i2s_basic/main/i2s_example_main.c

@@ -102,6 +102,7 @@ void app_main(void)
         .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1                                //Interrupt level 1
     };
     i2s_pin_config_t pin_config = {
+        .mck_io_num = I2S_PIN_NO_CHANGE,
         .bck_io_num = I2S_BCK_IO,
         .ws_io_num = I2S_WS_IO,
         .data_out_num = I2S_DO_IO,