examples/blink: convert tabs to spaces

examples/get-started/blink/main/blink.c

@@ -30,11 +30,11 @@ void app_main(void)
     gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT);
     while(1) {
         /* Blink off (output low) */
-	printf("Turning off the LED\n");
+        printf("Turning off the LED\n");
         gpio_set_level(BLINK_GPIO, 0);
         vTaskDelay(1000 / portTICK_PERIOD_MS);
         /* Blink on (output high) */
-	printf("Turning on the LED\n");
+        printf("Turning on the LED\n");
         gpio_set_level(BLINK_GPIO, 1);
         vTaskDelay(1000 / portTICK_PERIOD_MS);
     }