Fix XML error

Author: Dani-Hub

xml/issue4169.xml

@@ -2,7 +2,7 @@
 <!DOCTYPE issue SYSTEM "lwg-issue.dtd">
 
 <issue num="4169" status="New">
-<title><tt>std::atomic&ltT&gt;</tt>'s default constructor should be constrained</title>
+<title><tt>std::atomic&lt;T&gt;</tt>'s default constructor should be constrained</title>
 <section><sref ref="[atomics.types.operations]"/></section>
 <submitter>Giuseppe D'Angelo</submitter>
 <date>15 Oct 2024</date>