Add release to changelog.

maciejkula · maciejkula · commit 98570c717e82 · 2016-05-25T13:30:12.000+01:00
diff --git a/changelog.md b/changelog.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## [unreleased][unreleased]
+## [1.9][2016-05-25]
 ### Fixed
 - fixed gradient accumulation in adagrad (the feature value is now correctly used when accumulating gradient).
   Thanks to Benjamin Wilson for the bug report.
