Update CHANGELOG-EE.md for 10.5.5-ee

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CHANGELOG-EE.md

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+## 10.5.5 (2018-03-15)
+
+### Fixed (1 change)
+
+- Geo: Fix Wiki resync when Wiki repository does not exist.
+
+
 ## 10.5.4 (2018-03-08)
 
 ### Fixed (4 changes)

ee/changelogs/unreleased/sh-fix-wiki-resync.yml

----
-title: 'Geo: Fix Wiki resync when Wiki repository does not exist'
-merge_request:
-author:
-type: fixed