CHANGELOG.md in google-cloud-translate-1.2.3 vs CHANGELOG.md in google-cloud-translate-1.2.4

@@ -1,6 +1,12 @@
 # Release History
 
+### 1.2.4 / 2018-09-20
+
+* Update documentation.
+  * Change documentation URL to googleapis GitHub org.
+* Fix circular require warning.
+
 ### 1.2.3 / 2018-09-12
 
 * Add missing documentation files to package.
 
 ### 1.2.2 / 2018-09-10