Update CHANGELOG-EE.md for 8.17.1-ee

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CHANGELOG-EE.md

 Please view this file on the master branch, on stable branches it's out of date.
 
+## 8.17.1 (2017-02-28)
+
+- Fix admin email notification recipient group select list.
+- Add repository_storage field back to projects API for admin users.
+- Don't try to update a project's external service caches on a secondary Geo node.
+- Fixed merge request state not updating when approvals feature is active.
+- Improve error messages when squashing fails.
+
 ## 8.17.0 (2017-02-22)
 
 - Read-only "auditor" user role. !998

changelogs/unreleased-ee/1656-fix-admin-user-email-recipient-select-list.yml

----
-title: Fix admin email notification recipient group select list
-merge_request:
-author:

changelogs/unreleased-ee/add-repository-storage-back-to-api.yml

----
-title: Add repository_storage field back to projects API for admin users
-merge_request:
-author:

changelogs/unreleased-ee/geo-project-avoid-caching-data-on-first-access.yml

----
-title: Don't try to update a project's external service caches on a secondary Geo node
-merge_request:
-author:

changelogs/unreleased-ee/squash-errors.yml

----
-title: Improve error messages when squashing fails
-merge_request:
-author: