adc_oneshot_chan_cfg_t config: Fix attributes order in example to mat…

…ch the declaration

Closes #14304
Closes #14303

examples/peripherals/adc/oneshot_read/main/oneshot_read_main.c

@@ -63,8 +63,8 @@ void app_main(void)
 
     //-------------ADC1 Config---------------//
     adc_oneshot_chan_cfg_t config = {
-        .bitwidth = ADC_BITWIDTH_DEFAULT,
         .atten = EXAMPLE_ADC_ATTEN,
+        .bitwidth = ADC_BITWIDTH_DEFAULT,
     };
     ESP_ERROR_CHECK(adc_oneshot_config_channel(adc1_handle, EXAMPLE_ADC1_CHAN0, &config));
     ESP_ERROR_CHECK(adc_oneshot_config_channel(adc1_handle, EXAMPLE_ADC1_CHAN1, &config));