Tests: Disable crashing css-hover-shadow-dom.html test

Tests/LibWeb/TestConfig.ini

@@ -169,3 +169,7 @@ Text/input/wpt-import/html/rendering/replaced-elements/svg-embedded-sizing/svg-i
 Text/input/wpt-import/html/rendering/replaced-elements/svg-embedded-sizing/svg-in-object-auto.html
 Text/input/wpt-import/html/rendering/replaced-elements/svg-embedded-sizing/svg-in-object-fixed.html
 Text/input/wpt-import/html/rendering/replaced-elements/svg-embedded-sizing/svg-in-object-percentage.html
+
+; Crashes inconsistently on CI
+; https://github.com/LadybirdBrowser/ladybird/issues/2900
+Text/input/ShadowDOM/css-hover-shadow-dom.html