Update Introduction to migration guide

Author: P-R-O-C-H-Y

docs/source/migration_guide/2.x_to_3.0.rst

@@ -5,9 +5,8 @@ Migration from 2.x to 3.0
 Introduction
 ------------
 
-This is a guideline for the Arduino ESP32 project documentation. The idea for this guideline is to show how to start collaborating on the project.
-
-The guideline works to give you the directions and to keep the documentation more concise, helping users to better understand the structure.
+This is a guide to show breaking changes and to help migrate porjects from 2.X version to 3.0 version of Arduino ESP32 core. 
+For more informations about all changes and new features check `RELESE NOTES <https://github.com/espressif/arduino-esp32/releases>`_.
 
 Breaking changes in API
 -----------------------