LibWeb: Don't copy Tokens twice on StyleBlockRule initialization

Author: https://github.com/Hendiadyoin1
Commit: 6119783027
Pull-request: https://github.com/SerenityOS/serenity/pull/13030
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Libraries/LibWeb/CSS/Parser/StyleBlockRule.h

@@ -20,7 +20,7 @@ class StyleBlockRule : public RefCounted<StyleBlockRule> {
 public:
     StyleBlockRule();
     explicit StyleBlockRule(Token token, Vector<StyleComponentValueRule>&& values)
-        : m_token(token)
+        : m_token(move(token))
         , m_values(move(values))
     {
     }