Update manage-customer-activity-webhooks.mdx

Author: clairekinde11

src/content/docs/billing/manage-subscribers/manage-customer-activity-webhooks.mdx

@@ -24,9 +24,9 @@ More about webhooks: Manage [Kinde webhooks](/integrate/webhooks/about-webhooks/
 * **Description**: Triggered when a customer subscription is cancelled, this might be by the customer or by an admin
 * **Example**: Automatically deactivate premium features for a user in your application, initiate an offboarding sequence, or update their status in your CRM to "cancelled."
 
-### A customer signs up to a plan
+### A new agreement is created for a customer
 - **Trigger:** `customer.agreement_created`
-- **Description**: Triggered when a customer signs up to a new plan and an agreemenet is creeated for the customer.
+- **Description**: Triggered when a customer signs up to a plan or changes plans, and an agreement is created for the customer.
 - **Example**: Provision new services for the customer, send a welcome email confirming their subscription, or grant access to exclusive content.
 
 ### A customer's invoice becomes overdue