Added Respect the ToS of pool.ntp.org

The Update Interval was set by default to 60 seconds, but the ToS of pool.ntp.org say it need to be 30min at minimum

Author: Nora465

NTPClient.h

@@ -18,10 +18,10 @@ class NTPClient {
     unsigned int  _port           = NTP_DEFAULT_LOCAL_PORT;
     long          _timeOffset     = 0;
 
-    unsigned long _updateInterval = 60000;  // In ms
+    unsigned long _updateInterval = 3600000;  // In ms (1 hour : Defined by ToS of pool.ntp.org)
 
-    unsigned long _currentEpoc    = 0;      // In s
-    unsigned long _lastUpdate     = 0;      // In ms
+    unsigned long _currentEpoc    = 0;        // In s
+    unsigned long _lastUpdate     = 0;        // In ms
 
     byte          _packetBuffer[NTP_PACKET_SIZE];