The ornamental design for an adultchangingtable, as shown and described.
1. Adult changing table
1.1 : Perspective
1.2 : Bottom
1.3 : Top
1.4 : Front
1.5 : Right
1.6 : Left
The adult changing table is mounted on a wall.
The broken line shown in the bottom view 1.2 is for the purpose of illustrating portions of the adult changing table that forms no part of the claimed design.