chore: update CHANGES.txt for listdir - scandir change.

Also make line length to 65.

Author: rouilj

CHANGES.txt

@@ -16,9 +16,12 @@ Roundup 2.4.0 is the last release to support Python 2.
 2025-XX-XX 2.5.0
 
 Fixed:
-- issue2551343 - Remove support for PySQLite. It is unmaintained and
-  sqlite3 is used which is the default for a Python distribution.
-  (John Rouillard)
+- issue2551343 - Remove support for PySQLite. It is unmaintained
+  and sqlite3 is used which is the default for a Python
+  distribution.  (John Rouillard)
+- replace use of os.listdir with os.scandir. Performance
+  improvement.  Using with Python 2 requires 'pip install
+  scandir'. (John Rouillard)
 
 Features: