Update CHANGELOG-EE.md for 13.10.1-ee

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CHANGELOG-EE.md

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+## 13.10.1 (2021-03-31)
+
+### Security (1 change)
+
+- Escape HTML on scoped labels tooltip.
+
+
 ## 13.10.0 (2021-03-22)
 ### Removed (1 change)

ee/changelogs/unreleased/security-291004-scoped-label-xss.yml

----
-title: Escape HTML on scoped labels tooltip
-merge_request:
-author:
-type: security