Add changelog entry for deprecation of backtick operator in PHP 8.5.0 (#5017)

language/operators/execution.xml

@@ -36,6 +36,28 @@ echo "<pre>$output</pre>";
   </para>
  </note>
 
+ <sect2 role="changelog">
+  &reftitle.changelog;
+  <informaltable>
+   <tgroup cols="2">
+    <thead>
+     <row>
+      <entry>&Version;</entry>
+      <entry>&Description;</entry>
+     </row>
+    </thead>
+    <tbody>
+     <row>
+      <entry>8.5.0</entry>
+      <entry>
+       The backtick operator as an alias for <function>shell_exec</function> has been deprecated.
+      </entry>
+     </row>
+    </tbody>
+   </tgroup>
+  </informaltable>
+ </sect2>
+
  <sect2 role="seealso">
   &reftitle.seealso;
   <para>