updating release notes

release-notes.md

@@ -1,3 +1,13 @@
-# v1.1.1
+# v1.2.0-rc
 
-- Fixing charts validation not allowing the use of older chart versions.
+This release focuses on improving Helmsman latency and supporting multi-tenant clusters.
+
+- Up to 7x faster than previous version.
+- Introducing the `--skip-validation` flag which skips validating the desired state.
+- Support for multi-tenant k8s clusters through:
+    - Supporting deployment of Tiller in several namespaces with different service accounts
+    - Supporting securing Tillers with TLS.
+    - Supporting using `Secrets` as a storage background instead of configMaps.
+ - Upgrading rolledback releases automatically after rollback to avoid missing changed values.
+ - More concise logs.
+ - Several minor enhancements.