[Gardening]: [iOS] imported/w3c/web-platform-tests/html/semantics/interactive-elements/the-details-element/details-toggle-source.html is a constant failure

https://bugs.webkit.org/show_bug.cgi?id=302899
rdar://165163318

Unreviewed gardening

* LayoutTests/platform/ios/TestExpectations:

Canonical link: https://commits.webkit.org/303357@main

Author: martadarbinyan

LayoutTests/platform/ios/TestExpectations

@@ -8386,3 +8386,5 @@ webkit.org/b/301175 editing/selection/ios/become-first-responder-after-relinquis
 webkit.org/b/302893 imported/w3c/web-platform-tests/html/interaction/focus/focus-input-type-switch.html [ Failure ]
 
 webkit.org/b/302898 imported/w3c/web-platform-tests/html/rendering/widgets/input-date-no-resize-on-hover.html [ Failure ]
+
+webkit.org/b/302899 imported/w3c/web-platform-tests/html/semantics/interactive-elements/the-details-element/details-toggle-source.html [ Failure ]