Add "Upgrading from Godot 4.1 to Godot 4.2" page (godotengine#8488)

* Add "Upgrading from Godot 4.1 to Godot 4.2" page

* Update tutorials/migrating/upgrading_to_godot_4.2.rst

Co-authored-by: Hugo Locurcio <[email protected]>

* Apply suggestions from code review

Co-authored-by: Hugo Locurcio <[email protected]>
Co-authored-by: A Thousand Ships <[email protected]>
Co-authored-by: Cerno_b <[email protected]>

---------

Co-authored-by: Hugo Locurcio <[email protected]>
Co-authored-by: A Thousand Ships <[email protected]>
Co-authored-by: Cerno_b <[email protected]>

Author: 4 people

tutorials/migrating/index.rst

@@ -19,3 +19,4 @@ path.
 
    upgrading_to_godot_4
    upgrading_to_godot_4.1
+   upgrading_to_godot_4.2