Fix ref link in css/css-backgrounds/box-shadow-radius-000.html

box-shadow-radius-001-ref.html -> box-shadow-radius-000-ref.html

Bug: 1159514
Change-Id: I3611c3bf85143b038da652c4f28e66d2378439a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2600693Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#839103}

third_party/blink/web_tests/external/wpt/css/css-backgrounds/box-shadow-radius-000.html

@@ -2,7 +2,7 @@
 <title>Box Shadow Border Radius (Outset)</title>
 <link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact">
 <link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#shadow-shape">
-<link rel="match" href="box-shadow-radius-001-ref.html">
+<link rel="match" href="box-shadow-radius-000-ref.html">
 
 <style>
   body > div {