update CHANGES.txt with missing jiras
diff --git a/CHANGES.txt b/CHANGES.txt
index 5f3eb10..f9fbc29 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,5 +1,6 @@
 1.0.0
 -----
+ * Add integration tests task (CASSANDRA-15031)
  * Add support for SSL and bindable address (CASSANDRA-15030)
  * Autogenerate API docs for sidecar (CASSANDRA-15028)
  * C* Management process (CASSANDRA-14395)