Update CHANGELOG-EE.md for 11.4.5-ee

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CHANGELOG-EE.md

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+## 11.4.5 (2018-11-04)
+
+### Fixed (1 change)
+
+- Stops showing review actions on commit discussions in merge requests. !8007
+
+### Performance (1 change)
+
+- Add indexes to all geo event foreign keys. !7990
+
+
 ## 11.4.4 (2018-10-30)
 
 - No changes.

ee/changelogs/unreleased/batch-comments-commit-comment.yml

----
-title: Stops showing review actions on commit discussions in merge requests
-merge_request: 8007
-author:
-type: fixed

ee/changelogs/unreleased/tc-add-missing-geo-event-indexes.yml

----
-title: Add indexes to all geo event foreign keys
-merge_request: 7990
-author:
-type: performance