Update CHANGELOG.md for 10.3.9

CHANGELOG.md

@@ -2,6 +2,15 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
 
+## 10.3.9 (2018-03-16)
+
+### Security (3 changes)
+
+- Fixed some SSRF vulnerabilities in services, hooks and integrations. !2337
+- Update nokogiri to 1.8.2. !16807
+- Fix GitLab Auth0 integration signing in the wrong user.
+
+
 ## 10.3.8 (2018-03-01)
 
 ### Security (1 change)

changelogs/unreleased/42591-update-nokogiri.yml

----
-title: Update nokogiri to 1.8.2
-merge_request: 16807
-author:
-type: security

changelogs/unreleased/fix-auth0-unsafe-login.yml

----
-title: Fix GitLab Auth0 integration signing in the wrong user
-merge_request:
-author:
-type: security

changelogs/unreleased/fj-15329-services-callbacks-ssrf.yml

----
-title: Fixed some SSRF vulnerabilities in services, hooks and integrations
-merge_request: 2337
-author:
-type: security