Update CHANGELOG.md for 10.6.5

CHANGELOG.md

@@ -2,6 +2,13 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
 
+## 10.6.5 (2018-04-24)
+
+### Security (1 change)
+
+- Sanitizes user name to avoid XSS attacks.
+
+
 ## 10.6.4 (2018-04-09)
 
 ### Fixed (8 changes, 1 of them is from the community)

changelogs/unreleased/security_issue_42029.yml

----
-title: Sanitizes user name to avoid XSS attacks
-merge_request:
-author:
-type: security