[Gardening]: NEW TEST: [ Sonoma wk2 ] fast/rendering/render-style-nul…

…l-optgroup-crash.html is flaky

https://bugs.webkit.org/show_bug.cgi?id=264362
rdar://118077184

Unreviewed test gardening.

Adding test expectation

* LayoutTests/platform/mac-wk2/TestExpectations:

Canonical link: https://commits.webkit.org/270357@main

LayoutTests/platform/mac-wk2/TestExpectations

@@ -1993,3 +1993,5 @@ webkit.org/b/263920 svg/transforms/transformed-text-fill-gradient.html [ Pass Im
 webkit.org/b/264266 [ Ventura+ x86_64 ] imported/w3c/web-platform-tests/css/filter-effects/filters-drop-shadow-002.html [ ImageOnlyFailure ]
 
 webkit.org/b/264306 [ Sonoma+ ] fast/scrolling/mac/scrollbars/very-wide-overlay-scrollbar.html [ Pass ImageOnlyFailure Timeout ]
+
+webkit.org/b/264362 [ Sonoma+ ] fast/rendering/render-style-null-optgroup-crash.html [ Pass Failure ]