[ci skip] Add changelog entry for PR #4522
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 2278412..de488a9 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -7,6 +7,10 @@
 
 Release Date: Not Released
 
+-  General Changes
+
+   -  Added a destructor to :doc:`Cache Library <libraries/caching>` 'memcached' driver to ensure that Memcache(d) connections are properly closed.
+
 Bug fixes for 3.0.6
 -------------------