Update CHANGELOG-EE.md for 11.7.1-ee

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CHANGELOG-EE.md

 Please view this file on the master branch, on stable branches it's out of date.
 
+## 11.7.1 (2019-01-28)
+
+### Security (6 changes)
+
+- Avoid leaking unauthorized approver group members. !766
+- Sanitize user full name to clean up any URL to prevent mail clients from auto-linking URLs. !791
+- Check access rights when creating/updating ProtectedRefs.
+- Fix locked file visibility issue for private repositories.
+- Filter out non-project member approvers.
+- Remove HTTP POST in JIRA OAuth access_token endpoint.
+
+
 ## 11.7.0 (2019-01-22)
 
 ### Security (1 change)

ee/changelogs/unreleased/security-7754.yml

----
-title: Filter out non-project member approvers
-merge_request:
-author:
-type: security

ee/changelogs/unreleased/security-fix-locked-files-visibility.yml

----
-title: Fix locked file visibility issue for private repositories
-merge_request:
-author:
-type: security

ee/changelogs/unreleased/security-fix-protected-branches-creation-access-rights.yml

----
-title: Check access rights when creating/updating ProtectedRefs
-merge_request:
-author:
-type: security

ee/changelogs/unreleased/security-leaky-approver-group-members.yml

----
-title: Avoid leaking unauthorized approver group members
-merge_request: 766
-author:
-type: security

ee/changelogs/unreleased/security-remove-post-in-jira-oauth.yml

----
-title: Remove HTTP POST in JIRA OAuth access_token endpoint
-merge_request:
-author:
-type: security