Update Chengelog

Documentation/changelog.md

 ### Version 4.1.5
+* Critical stepper motor frequency bugfix
+* Introduced more intuitive menu tree.
+* Added a menu option to fix loose steps from LCD
+* Improved italian translation
+* G28 gcode now support the "B" flag that enable you to come back to the last position of the axis before the homing command. (Used for fix loose steps)
 * Implemented FAST_PWM_FAN and FAN_SOFT_PWM also for other fan that can be added in configuration_adv file.
 * Added the ability to set a min speed to the fan that can be added in configuration_adv file.
-* Critical stepper motor frequency bugfix
 * General bugfix
 
 ### Version 4.1.4