Update RELEASES.md

Danny McCormick · web-flow · commit 7f17a6e5505f · 2019-09-05T16:04:32.000-04:00
diff --git a/packages/core/RELEASES.md b/packages/core/RELEASES.md
@@ -1,5 +1,9 @@
 # @actions/core Releases
 
+### 1.1.0
+
+- Added helpers for `group` and `endgroup` [#98](https://github.com/actions/toolkit/pull/98)
+
 ### 1.0.0
 
-- Initial release
+- Initial release
