Updated links to the book

examples/JsonConfigFile/JsonConfigFile.ino

@@ -141,4 +141,4 @@ void loop() {
 // The book "Mastering ArduinoJson" contains a case study of a project that has
 // a complex configuration with nested members.
 // Contrary to this example, the project in the book uses the SPIFFS filesystem.
-// Please check it out at: https://leanpub.com/arduinojson/
+// Please check it out at: https://arduinojson.org/book/

examples/JsonGeneratorExample/JsonGeneratorExample.ino

@@ -78,4 +78,4 @@ void loop() {
 // The book "Mastering ArduinoJson" contains a tutorial on serialization.
 // It begins with a simple example, like the one above, and then adds more
 // features like serializing directly to a file or an HTTP request.
-// Please check it out at: https://leanpub.com/arduinojson/
+// Please check it out at: https://arduinojson.org/book/

examples/JsonHttpClient/JsonHttpClient.ino

@@ -109,4 +109,4 @@ void loop() {
 // showing how to parse the response from Yahoo Weather. In the last chapter,
 // it shows how to parse the huge documents from OpenWeatherMap
 // and Weather Underground.
-// Please check it out at: https://leanpub.com/arduinojson/
+// Please check it out at: https://arduinojson.org/book/

examples/JsonParserExample/JsonParserExample.ino

@@ -75,4 +75,4 @@ void loop() {
 // The book "Mastering ArduinoJson" contains a tutorial on deserialization.
 // It begins with a simple example, like the one above, and then adds more
 // features like deserializing directly from a file or an HTTP request.
-// Please check it out at: https://leanpub.com/arduinojson/
+// Please check it out at: https://arduinojson.org/book/

examples/JsonServer/JsonServer.ino

@@ -106,4 +106,4 @@ void loop() {
 // The book "Mastering ArduinoJson" contains a tutorial on serialization.
 // It begins with a simple example, then adds more features like serializing
 // directly to a file or an HTTP client.
-// Please check it out at: https://leanpub.com/arduinojson/
+// Please check it out at: https://arduinojson.org/book/

examples/JsonUdpBeacon/JsonUdpBeacon.ino

@@ -98,4 +98,4 @@ void loop() {
 // The book "Mastering ArduinoJson" contains a tutorial on serialization.
 // It begins with a simple example, then adds more features like serializing
 // directly to a file or any stream.
-// Please check it out at: https://leanpub.com/arduinojson/
+// Please check it out at: https://arduinojson.org/book/

examples/ProgmemExample/ProgmemExample.ino

@@ -64,4 +64,4 @@ void loop() {
 // The book "Mastering ArduinoJson" contains a quick C++ course that explains
 // how your microcontroller stores strings in memory. It also tells why you
 // should not abuse Flash strings with ArduinoJson.
-// Please check it out at: https://leanpub.com/arduinojson/
+// Please check it out at: https://arduinojson.org/book/

examples/StringExample/StringExample.ino

@@ -68,4 +68,4 @@ void loop() {
 // The book "Mastering ArduinoJson" contains a quick C++ course that explains
 // how your microcontroller stores strings in memory. On several occasions, it
 // shows how you can avoid String in your program.
-// Please check it out at: https://leanpub.com/arduinojson/
+// Please check it out at: https://arduinojson.org/book/