Update CHANGELOG.md for 9.3.2

[ci skip]

CHANGELOG.md

@@ -2,6 +2,11 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
+## 9.3.2 (2017-06-27)
+
+- API: Fix optional arugments for POST :id/variables. !12474
+- Bump premailer-rails gem to 1.9.7 and its dependencies to prevent network retrieval of assets.
+
 ## 9.3.1 (2017-06-26)
 - Fix reversed breadcrumb order for nested groups. !12322

changelogs/unreleased/34282-fix-api-using-include_missing-false.yml

----
-title: 'API: Fix optional arugments for POST :id/variables'
-merge_request: 12474
-author:

changelogs/unreleased/sh-fix-premailer-gem-for-filesystem.yml

----
-title: Bump premailer-rails gem to 1.9.7 and its dependencies to prevent network retrieval
-  of assets
-merge_request:
-author: