Update xml/issue4409.xml

Co-authored-by: Jonathan Wakely <[email protected]>

Author: tomaszkam

xml/issue4409.xml

@@ -87,7 +87,7 @@ down in the preconditions).
 Set priority to P3 after reflector poll.
 </p>
 <p>
-General preference on considering this NAD, and instread clarifying that
+General preference on considering this NAD, and instead clarifying that
 operations on integer-class should produce constant expressions.
 </p>
 </discussion>