Update reference.md

Author: csviri

docs/reference.md

@@ -2,6 +2,8 @@
 
 ## Deployment
 
+### Deployment Modes
+
 ## Glue Resource
 
 ## GlueOperator Resource
@@ -20,4 +22,4 @@ https://github.com/fabric8io/kubernetes-client/issues/5729~~
 ## Related Documents
 
 - [Dependent Resources documentation in Java Operator SDK](https://javaoperatorsdk.io/docs/dependent-resources)
-- [Workflows documentation in Java Operator SDK](https://javaoperatorsdk.io/docs/workflows)
+- [Workflows documentation in Java Operator SDK](https://javaoperatorsdk.io/docs/workflows)