ci(storyshots): don't fail with a single pixel diff
Related works:
We have recently seen a few visual tests failing because of a single-pixel diff, even after triggering the update_screenshots CI job. This MR prevents this from happening by considering single-pixel diffs as successful tests. Any meaningful change to a component would most likely never result in single-pixel diffs, so it should be safe to assume that such failures are outliers and can be ignored.
Edited by Paul Gascou-Vaillancourt