Update CHANGELOG.md for 13.2.9

[ci skip]

CHANGELOG.md

@@ -2,6 +2,14 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
+## 13.2.9 (2020-09-04)
+
+### Fixed (2 changes)
+
+- Fix ActiveRecord::IrreversibleOrderError during restore from backup. !40789
+- Update the 2FA user update check to account for rounding errors. !41327
+
+
 ## 13.2.8 (2020-09-02)
 ### Security (1 change)

changelogs/unreleased/cat-time-precision-2fa-ldap.yml

----
-title: Update the 2FA user update check to account for rounding errors
-merge_request: 41327
-author:
-type: fixed

changelogs/unreleased/sh-fix-backup-restore-race.yml

----
-title: Fix ActiveRecord::IrreversibleOrderError during restore from backup
-merge_request: 40789
-author:
-type: fixed