Improve code comment in submission text example

Author: Dani-Hub

xml/issue4253.xml

@@ -27,7 +27,7 @@ using BI = std::basic_const_iterator<I>;
 static_assert(std::same_as<RI::iterator_type, I>);
 static_assert(std::same_as<MI::iterator_type, I>);
 static_assert(std::same_as<CI::iterator_type, I>);
-static_assert(std::same_as&lt;BI::iterator_type, I&gt;); // <span  style="color:#C80000;font-weight:bold">fire</span>
+static_assert(std::same_as&lt;BI::iterator_type, I&gt;); // <span  style="color:#C80000;font-weight:bold">error</span>
 </pre></blockquote>
 <p>
 It seems reasonable to add one for `basic_const_iterator` for consistency.