Add links to case settings page

docs/en/serverless/cases/create-manage-cases.mdx

@@ -16,7 +16,7 @@ To create a case in your Observability project:
 
 1. In your ((observability)) project, go to **Cases**.
 1. Click **Create case**.
-1. (Optional) If you defined templates, select one to use its default field values. <DocCallOut template="technical_preview" />
+1. (Optional) If you defined <DocLink slug="/serverless/observability/case-settings" section="templates">templates</DocLink>, select one to use its default field values. <DocCallOut template="technical_preview" />
 1. Give the case a name, severity, and description.
 
     <DocCallOut title="Tip">
@@ -29,6 +29,8 @@ To create a case in your Observability project:
     (all I know is that they can _view_ the case) */}
     You can add users who are assigned the Editor user role (or a more permissive role) for the project.
 
+1. If you defined <DocLink slug="/serverless/observability/case-settings" section="custom-fields">custom fields</DocLink>, they appear in the **Additional fields** section. 
+
 1. (Optional) Under External incident management system, you can select a connector to send cases to an external system.
     If you've created any connectors previously, they will be listed here.
     If there are no connectors listed, you can <DocLink slug="/serverless/observability/case-settings">create one</DocLink>.