Update README.md

Author: ArduinoDenis

README.md

@@ -2,7 +2,7 @@
 
 ## Documentation
 
-For further information and detailed documentation, please refer to the [project's GitBook](https://docs.arduinodenis.com/github/resources-arduino/arduino-projects/project-1-arduino).
+For further information and detailed documentation, please refer to the [Documentation](https://docs.arduinodenis.com/github/resources-arduino/arduino-projects/project-1-arduino).
 
 ## License