DATAES-374 - Updated changelog.

Author: odrotbohm

src/main/resources/changelog.txt

@@ -1,6 +1,11 @@
 Spring Data Elasticsearch Changelog
 ===================================
 
+Changes in version 2.1.6.RELEASE (2017-07-26)
+---------------------------------------------
+* DATAES-374 - Release 2.1.6 (Ingalls SR6).
+
+
 Changes in version 3.0.0.RC2 (2017-07-25)
 -----------------------------------------
 * DATAES-375 - Release 3.0 RC2 (Kay).