Update CHANGELOG.md for 10.2.4

CHANGELOG.md

@@ -2,6 +2,15 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
 
+## 10.2.4 (2017-12-07)
+
+### Security (3 changes)
+
+- Don't match partial email adresses. !2227
+- Prevent creating issues through API when user does not have permissions.
+- Prevent an information disclosure in the Groups API.
+
+
 ## 10.2.3 (2017-11-30)
 
 ### Fixed (7 changes)

changelogs/unreleased/bvl-email-disclosure.yml

----
-title: Don't match partial email adresses
-merge_request: 2227
-author:
-type: security

changelogs/unreleased/issue_30663.yml

----
-title: Prevent creating issues through API when user does not have permissions
-merge_request:
-author:
-type: security

changelogs/unreleased/rs-security-group-api.yml

----
-title: Prevent an information disclosure in the Groups API
-merge_request:
-author:
-type: security