Update CHANGELOG.md for 11.2.1

[ci skip]

CHANGELOG.md

@@ -2,6 +2,18 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
+## 11.2.1 (2018-08-22)
+
+### Fixed (2 changes)
+
+- Fix wrong commit count in push event payload. !21338
+- Fix broken Git over HTTP clones with LDAP users. !21352
+
+### Performance (1 change)
+
+- Eliminate unnecessary and duplicate system hook fires. !21337
+
+
 ## 11.2.0 (2018-08-22)
 ### Security (5 changes)

changelogs/unreleased/sh-conditional-system-hook-push.yml

----
-title: Eliminate unnecessary and duplicate system hook fires
-merge_request: 21337
-author:
-type: performance

changelogs/unreleased/sh-fix-broken-ldap-clones.yml

----
-title: Fix broken Git over HTTP clones with LDAP users
-merge_request: 21352
-author:
-type: fixed

changelogs/unreleased/sh-fix-wrong-commit-count-in-push.yml

----
-title: Fix wrong commit count in push event payload
-merge_request: 21338
-author:
-type: fixed