Update simple-audio-player.md

Changed constant 4 with static SDCARD_SS_PIN

Author: giuggiodk

content/tutorials/generic/simple-audio-player/simple-audio-player.md

@@ -149,7 +149,7 @@ void setup()
 
   Serial.print("Initializing SD card...");
 
-  if (!SD.begin(4)) {
+  if (!SD.begin(SDCARD_SS_PIN)) {
 
     Serial.println(" failed!");
 
@@ -213,4 +213,4 @@ If the code is not working, there are some common issues we can troubleshoot:
 
 ## Conclusion
 
-In this example, we have learned how to create a simple audio player using the AudioZero library! If you want to extend this project, take a look at the [Weather Audio Notifier](https://docs.arduino.cc/tutorials/zero/weather-audio-notifier) tutorial to create a project that notifies you of weather changes.
+In this example, we have learned how to create a simple audio player using the AudioZero library! If you want to extend this project, take a look at the [Weather Audio Notifier](https://docs.arduino.cc/tutorials/zero/weather-audio-notifier) tutorial to create a project that notifies you of weather changes.