Update CHANGELOG.md for 9.3.8

[ci skip]

CHANGELOG.md

@@ -2,6 +2,13 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
 
+## 9.3.8 (2017-07-19)
+
+- Improve support for external issue references. !12485
+- Renders 404 if given project is not readable by the user on Todos dashboard.
+- Use uploads/system directory for personal snippets.
+- Remove uploads/appearance symlink. A leftover from a previous migration.
+
 ## 9.3.7 (2017-07-18)
 
 - Prevent bad data being added to application settings when Redis is unavailable. !12750

changelogs/unreleased/adam-external-issue-references-spike.yml

----
-title: Improve support for external issue references
-merge_request: 12485
-author: