changelog: add notes about closing #13692

[skip ci]

CHANGELOG.md

@@ -16,6 +16,10 @@
 
 * Postgres/MySQL/MSSQL datasources now per default uses `max open connections` = `unlimited` (earlier 10), `max idle connections` = `2` (earlier 10) and `connection max lifetime` = `4` hours (earlier unlimited)
 
+# 5.3.2 (unreleased)
+
+* **Postgres**: Fix template variables error [#13692](https://github.com/grafana/grafana/issues/13692), thx [@svenklemm](https://github.com/svenklemm)
+
 # 5.3.1 (2018-10-16)
 
 * **Render**: Fix PhantomJS render of graph panel when legend displayed as table to the right [#13616](https://github.com/grafana/grafana/issues/13616)