I would like to suggest to change the wording to be more neutral.
(As it can be 3->2 or 1->2)
You have reached another trust level.
At Level 2, it means …
We’ve promoted you up another trust level !
Achieving Trust Level 2 means that you have read and actively participated enough to be considered a member of this community.
As an experienced user, you might appreciate this list of handy tips and tricks.
We invite you to keep getting involved – we enjoy having you around.