Bug 1470028 [wpt PR 11594] - Update wpt metadata, a=testonly

wpt-pr: 11594
wpt-type: metadata

testing/web-platform/meta/css/cssom/getComputedStyle-pseudo.html.ini

@@ -9,3 +9,6 @@
   [Unknown pseudo-elements throw]
     expected: FAIL
 
+  [Dynamically change to display: contents on pseudo-elements]
+    expected: FAIL
+