plum-blossom-large.profile0.8bpc.yuv420.alpha-limited.monochrome.avif and variant images need to be updated

[prigupta-adobe]

As reported in issue - #4, all plum blossom files present in sample images fail libavif check even with strict flag disabled. As per the update on mentioned issue, it seems link-u has fixed this back in 2022 but the sample images are still buggy. Our QE team picked up these images recently and we had to trace down the issue.
Can the sample images be updated in correspondence to the fix?