css-highlight-api: Accept more pixel differences in custom-highlight-painting-vertical-writing-mode-001.html
The test fails consistently on the linux-wpt-chromium-rel bot. This CL
fixes it.
Change-Id: I4f1b24fe01e0454c92377f1f6f84151517b6dead
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5717594
Auto-Submit: Kent Tamura tkent@chromium.org
Reviewed-by: Koji Ishii kojii@chromium.org
Commit-Queue: Koji Ishii kojii@chromium.org
Cr-Commit-Position: refs/heads/main@{#1329466}