Changed all links to point to arduinojson.org

examples/JsonUdpBeacon/JsonUdpBeacon.ino

@@ -49,7 +49,7 @@ void setup() {
 void loop() {
   delay(1000);
 
-  // Use https://bblanchon.github.io/ArduinoJson/assistant/ to
+  // Use http://arduinojson.org/assistant/ to
   // compute the right size for the buffer
   StaticJsonBuffer<300> jsonBuffer;
   JsonObject& json = buildJson(jsonBuffer);