Update CHANGELOG.md for 11.1.1

[ci skip]

CHANGELOG.md

@@ -2,6 +2,18 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
+## 11.1.1 (2018-07-23)
+
+### Fixed (2 changes)
+
+- Add missing Gitaly branch_update nil checks. !20711
+- Fix filename for accelerated uploads.
+
+### Added (1 change)
+
+- Add uploader support to Import/Export uploads. !20484
+
+
 ## 11.1.0 (2018-07-22)
 ### Security (6 changes)

changelogs/unreleased/48745-project-exports-fail-when-uploads-have-been-migrated-to-object-storage.yml

----
-title: Add uploader support to Import/Export uploads
-merge_request: 20484
-author:
-type: added

changelogs/unreleased/fix-filename-for-direct-uploads.yml

----
-title: Fix filename for accelerated uploads
-merge_request:
-author:
-type: fixed

changelogs/unreleased/gitaly-ff-branch-nil.yml

----
-title: Add missing Gitaly branch_update nil checks
-merge_request: 20711
-author:
-type: fixed