Update CHANGELOG-EE.md for 13.0.9-ee

[ci skip]

CHANGELOG-EE.md

@@ -19,6 +19,13 @@ Please view this file on the master branch, on stable branches it's out of date.
 - No changes.
+## 13.0.9 (2020-07-06)
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+### Security (1 change)
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+- Maven packages upload endpoint is now properly using the uploaded file set by middleware.
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+
 ## 13.0.8 (2020-07-01)
 ### Security (2 changes)