Fix fuzzy matching on dynamic-content-change-rendering.html

I added fuzzy matching to this test in https://crrev.com/905947 but that
caused the test to fail everywhere [1] due to requiring a certain number
of pixels to be different. This patch fixes that so the test now passes.

I confirmed locally using the WPT runner that the test failed before
https://crrev.com/905947 and now passes. I am unable to reproduce the
original pixel differences seen on wpt.fyi so this is still a
speculative fix.

[1] https://wpt.fyi/results/html/semantics/forms/the-option-element/dynamic-content-change-rendering.html?label=master&label=experimental&aligned&q=dynamic-content-change-rendering.html

Change-Id: I8ea0572fee2b84d518df2daff51742155f3b4846
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3059121
Auto-Submit: Philip Rogers <pdr@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#906448}
diff --git a/html/semantics/forms/the-option-element/dynamic-content-change-rendering.html b/html/semantics/forms/the-option-element/dynamic-content-change-rendering.html
index 1f4ac9f..1108c45 100644
--- a/html/semantics/forms/the-option-element/dynamic-content-change-rendering.html
+++ b/html/semantics/forms/the-option-element/dynamic-content-change-rendering.html
@@ -4,7 +4,7 @@
 <link rel="help" href="https://html.spec.whatwg.org/C/#concept-option-label">
 <link rel="help" href="http://crbug.com/1090806">
 <link rel="match" href="dynamic-content-change-rendering-ref.html">
-<meta name=fuzzy content="maxDifference=3;totalPixels=20">
+<meta name=fuzzy content="maxDifference=0-3;totalPixels=20">
 <body>
 
 <select id="dropdown">