fixes background for changeling ability buttons

[ktlwjec0]

Document the changes in your pull request

Gives changeling buttons their intended background. Background was ported along with the resprites in #22003 but didn't work correctly, so it was still using the old one.

Testing

Spriting

Nothing new, but here is the background from the PR listed above:

:cl: ktlwjec imageadd: Changeling buttons use the correct background. /:cl: