Merge branch '4.5.6_changelog' into 'MOODLE_400_STABLE'

WPOS-46 change log describing fixed behaviour.

See merge request workplace/moodle-tool_certificate!236

Author: dravek

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## Unreleased
+### Fixed
+- Fixed issue where bulk PDF generation could fill up local temporary directory
+
 ## 4.5.5 - 2025-06-10
 ### Fixed
 - Fixed an issue where course navigation was not working correctly when viewing a certificate