Adjust formula to be built

Change-Id: Iea17dc349789247bcbdf88f72c841cdaa23e752f
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 4834828..60b56fe 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,4 +1,4 @@
-oslo-templates formula
+oslo_templates formula
 =====================================
 
 2018.1 (2018-05-18)