Bug 1824492 [wpt PR 39200] - Update wpt metadata, a=testonly

wpt-pr: 39200
wpt-type: metadata

testing/web-platform/meta/html/semantics/forms/the-selectmenu-element/selectmenu-pseudo-open-closed.tentative.html.ini

@@ -0,0 +1,6 @@
+[selectmenu-pseudo-open-closed.tentative.html]
+  [Selectmenu should support :open and :closed pseudo selectors.]
+    expected: FAIL
+
+  [Selectmenu :open and :closed should invalidate correctly.]
+    expected: FAIL