DEVDOCS-6558 - adjust language of account deletion callout (#1113)

<!-- Ticket number or summary of work -->
# [DEVDOCS-6558]


## What changed?
* Webhooks no longer persist after API account deletion

## Release notes draft
* Webhooks no longer persist after API account deletion
*
https://developer.bigcommerce.com/docs/integrations/webhooks#post-app-uninstall-actions
*
https://developer.bigcommerce.com/docs/start/authentication/api-accounts#dont-forget-your-webhooks-and-metafields

## Anything else?

ping { @bigcommerce/dev-docs-team  }


[DEVDOCS-6558]:
https://bigcommercecloud.atlassian.net/browse/DEVDOCS-6558?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

---------

Co-authored-by: Chris Nowicki <[email protected]>

Author: bc-terra

docs/integrations/webhooks/overview.mdx

@@ -138,8 +138,8 @@ After the final retry attempt (cumulatively **48 hours** after the first deliver
 
 To avoid accumulating unused webhooks, BigCommerce automatically deletes registered webhooks on app uninstall.
 
-<Callout type="info">
-  You cannot delete a webhook by deleting the account token used to create it. The associated webhook will continue to run after you delete the token, and you will be unable to edit, delete, or manage the webhook. For information on how to manually delete a webhook, see [Delete a Webhook](/docs/webhooks/webhooks/manage-webhooks-single#delete-a-webhook).
+<Callout type="warning">
+Deleting an API account will permanently remove all associated webhooks. Verify any you still need before proceeding.
 </Callout>
 
 ## Platform limits

docs/start/authentication/api-accounts.mdx

@@ -77,6 +77,8 @@ To delete a store-level API account, consult our Knowledge Base article on [Dele
 <Callout type="warning">
   #### Don't forget your webhooks and metafields
   Some resources are only accessible to the API account that created them. These include webhooks, metafields, and scripts. If you need to revoke a store-level API account, plan accordingly.
+
+  Webhooks do not persist upon account deletion. Verify webhooks associated with an account before deleting it.
 </Callout>
 
 ## App-level API accounts