remove description value from model notifications example

this pr removes the `description` field/value from the groups.yml example. this is to make sure it isn't confused with the `description` config that dbt uses. 

pr also adds a callout clarifying that the `owner` field accepts any input (liek favorite_food).

website/docs/docs/deploy/model-notifications.md

@@ -38,21 +38,29 @@ groups:
   - name: finance
     owner:
       # Email is required to receive model-level notifications, additional properties are also allowed.
-      name: "Finance Team"
-      description: "Models related to the finance department"
+      name: "Finance team"
       email: [email protected]
       favorite_food: donuts
 
   - name: marketing
     owner:
-      name: "Marketing Team"
-      description: "Models related to the marketing department"
+      name: "Marketing team"
       email: [email protected]
       favorite_food: jaffles
+
+  - name: docs
+    owner:
+      name: "Documentation team"
+      email: [email protected]
+      favorite_food: pizza
 ```
 
 </File>
 
+:::tip
+The `owner` value is flexible and accepts arbitrary inputs in addition to the required `email` field. For example, you could include a custom field like `favorite_food` to add context about the team.
+:::
+
 ## Attach groups to models
 
 Attach groups to models as you would any other config, in either the `dbt_project.yml` or `whatever.yml` files. For example: