Update changes.md

Author: zdohnal

CHANGES.md

@@ -149,6 +149,8 @@ Changes in CUPS v2.5b1 (YYYY-MM-DD)
 - Fixed validation of dateTime values with time zones more than UTC+11
   (Issue #1201)
 - Fixed job cleanup after daemon restart (Issue #1315)
+- Fixed unreachable block in IPP backend (Issue #1351)
+- Fixed memory leak in _cupsConvertOptions (Issue #1354)
 - Removed hash support for SHA2-512-224 and SHA2-512-256.
 - Removed `mantohtml` script for generating html pages (use
   `https://www.msweet.org/mantohtml/`)