community/tuba: fix checksum
Seems only screenshots were changed:
Files Tuba-0.5.0.old/data/screenshots/screenshot-1.png and Tuba-0.5.0/data/screenshots/screenshot-1.png differ
Files Tuba-0.5.0.old/data/screenshots/screenshot-2.png and Tuba-0.5.0/data/screenshots/screenshot-2.png differ
Files Tuba-0.5.0.old/data/screenshots/screenshot-3.png and Tuba-0.5.0/data/screenshots/screenshot-3.png differ
Files Tuba-0.5.0.old/data/screenshots/screenshot-4.png and Tuba-0.5.0/data/screenshots/screenshot-4.png differ