Fix: Correct internet connection check logic

- Fixed the internet connection check logic during initialization.
- Updated log message for failed internet connection check to be accurate and instructive.
Closes #1

ddns_update.php

@@ -103,7 +103,7 @@ function checkInternetConnection()
 }
 
 //vérification de la connection internet
-if (checkInternetConnection()) {
+if (!checkInternetConnection()) {
     writeToLog("❌ Fatal : Veuillez vérifier votre connexion Internet pour l'initialisation.\n");
     die("⛔ Done !");
 }