LibWeb: Parse the scroll-timeline-axis CSS property

Author: https://github.com/Calme1709
Commit: 992b0a4dc6
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6912
Reviewed-by: https://github.com/AtkinsSJ ✅

Libraries/LibWeb/CSS/Parser/PropertyParsing.cpp

@@ -745,6 +745,7 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue const>> Parser::parse_css_value(Pr
         return parse_all_as(tokens, [this](auto& tokens) { return parse_translate_value(tokens); });
     case PropertyID::Scale:
         return parse_all_as(tokens, [this](auto& tokens) { return parse_scale_value(tokens); });
+    case PropertyID::ScrollTimelineAxis:
     case PropertyID::ScrollTimelineName:
         return parse_all_as(tokens, [this, property_id](auto& tokens) { return parse_simple_comma_separated_value_list(property_id, tokens); });
     case PropertyID::WhiteSpace: