Bug 1436497 [wpt PR 9352]- Update wpt metadata, a=testonly

wpt-pr: 9352
wpt-type: metadata

testing/web-platform/meta/html/semantics/scripting-1/the-script-element/muted-errors.sub.html.ini

@@ -0,0 +1,7 @@
+[muted-errors.sub.html]
+  [Errors for cross-origin script should be muted]
+    expected: FAIL
+
+  [Errors for cross-origin script should be muted even if the script is once loaded as same-origin]
+    expected: FAIL
+