Update CHANGELOG-EE.md for 11.5.2-ee

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CHANGELOG-EE.md

 Please view this file on the master branch, on stable branches it's out of date.
 
+## 11.5.2 (2018-12-03)
+
+### Fixed (2 changes)
+
+- Fix inability to scroll dashboard. !8459
+- Fix issues analytics query when ordering issues by priority. !8509
+
+
 ## 11.5.1 (2018-11-26)
 
 ### Security (6 changes)

ee/changelogs/unreleased/8407-operations-scroll-not-working-when-added-enough-projects-to-enable-scroll.yml

----
-title: Fix inability to scroll dashboard
-merge_request: 8459
-author:
-type: fixed

ee/changelogs/unreleased/issue_8475.yml

----
-title: Fix issues analytics query when ordering issues by priority
-merge_request: 8509
-author:
-type: fixed