Update custom_actions.rst

Author: shwstppr

source/adminguide/extensions/custom_actions.rst

@@ -15,7 +15,7 @@
    
 
 Custom Actions
---------------
+~~~~~~~~~~~~~~
 
 In addition to standard instance operations, extensions support custom actions. These can be configured via UI in the extension details view or the addCustomAction API. The extension entry-point must implement handlers for these action names and process any provided parameters.
 
@@ -44,7 +44,7 @@ A single parameter can have the following details:
    - **valueoptions**: Options for the value of the parameter. This is allowed only for NUMBER and STRING type.
 
 Running Custom Action
-~~~~~~~~~~~~~~~~~~~~~
+---------------------
 
 All enabled custom actions can then be triggered for a resource of the type the action is defined for or provided while running, using the **Run Action** view or runCustomAction API.