Move GITHUB#16271 changelog entry to Lucene 10.6.0

Author: slow-J

lucene/CHANGES.txt

@@ -287,7 +287,7 @@ New Features
 
 Improvements
 ---------------------
-(No changes)
+* GITHUB#16271: Add detail to KNN no-match explanations. (Jakub Slowinski)
 
 Optimizations
 ---------------------
@@ -439,8 +439,6 @@ Improvements
 * GITHUB#16264: Check if merge is aborted before executing file integrity checks to avoid
   costly full-file checksums on segments when the merge has already been cancelled. (Tanguy Leroux)
 
-* GITHUB#16271: Add detail to KNN no-match explanations. (Jakub Slowinski)
-
 Optimizations
 ---------------------
 * GITHUB#16111: Optimize FieldExistsQuery.count() when all docs have the field. (Prithvi S)