Update CHANGELOG-EE.md for 13.2.3-ee

[ci skip]

CHANGELOG-EE.md

 Please view this file on the master branch, on stable branches it's out of date.
+## 13.2.3 (2020-08-05)
+
+- No changes.
+
 ## 13.2.2 (2020-07-29)
 - No changes.