Merge upstream PR runhey#1893: update soul switch confirmation template

Merge commit 3e2b8d2 from runhey#1893. Update only the confirmation button PNG; its 180x61 dimensions remain compatible with the existing ROI and threshold declarations.

Validation: PNG decoded successfully, dimensions match assets.py and image.json, and git diff --check passed. No emulator run performed.

Author: iaunz